CN115682889A - Structural joint deformation monitoring device and using method - Google Patents
Structural joint deformation monitoring device and using method Download PDFInfo
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- CN115682889A CN115682889A CN202211345142.2A CN202211345142A CN115682889A CN 115682889 A CN115682889 A CN 115682889A CN 202211345142 A CN202211345142 A CN 202211345142A CN 115682889 A CN115682889 A CN 115682889A
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 27
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- 238000004891 communication Methods 0.000 claims description 6
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- 238000005452 bending Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 11
- 238000010276 construction Methods 0.000 description 5
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- 239000002184 metal Substances 0.000 description 2
- 238000010223 real-time analysis Methods 0.000 description 2
- 238000012502 risk assessment Methods 0.000 description 2
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Abstract
The invention relates to the technical field of structural deformation monitoring, in particular to a monitoring device capable of monitoring the opening amount and the slab staggering amount of a structural seam at the same time and a using method thereof; the device comprises a left side structure (1), a right side structure (2), a device bottom plate (3), a fixing bolt (5), a splicing screw rod (6), a dial indicator measuring rod (8), a vertical dial indicator panel (10) and a transverse dial indicator panel (11) which are based on the device; a micrometer gauge measuring rod (8) in the vertical micrometer gauge board (10) is parallel to the structural seam; a micrometer gauge measuring rod (8) in the transverse micrometer gauge panel (11) is perpendicular to the structural seam; the invention solves the technical problems of single function, lower measurement precision, lower working efficiency and higher cost of the existing measuring tool and measuring method for the joint deformation.
Description
Technical Field
The invention relates to the technical field of structural deformation monitoring, in particular to a monitoring device capable of monitoring the opening amount and the slab staggering amount of a structural joint simultaneously and a using method thereof.
Background
When the construction and structure engineering on the ground or underground is used, the foundation can be subjected to different degrees of uneven settlement or soil body migration under the influence of human or natural factors such as peripheral construction, surrounding rock load, operation load, natural rainfall, earthquake, explosion and the like, so that the main structure of the construction and structure can be deformed, and if the construction and structure is not properly treated, the normal use of the construction and structure can be influenced, and even safety accidents can be caused. The continuous monitoring of the deformation of the structural joint of the building and the structure is one of important means for tracking and evaluating the safety and the comfort state of the structure.
At present, tools such as a tape measure, a vernier caliper or a laser distance measurement are generally adopted to carry out structural joint deformation monitoring in a manual measurement mode, but the problems of inconvenience in operation, poor precision, insufficient timeliness, high cost and the like often exist. In addition, the existing measurement means always measure the opening amount and the slab staggering amount of the structural joint independently, and the problems of large measurement workload, complex operation and the like exist. Therefore, a convenient, efficient, accurate and real-time monitoring device and monitoring method for structural joint deformation are needed.
Disclosure of Invention
In order to solve the problems, the invention provides an automatic monitoring device and a monitoring method suitable for joint opening and slab staggering deformation of a building and a structure, and solves the technical problems of single function, lower measurement precision, lower working efficiency and higher cost of the conventional measuring tool and measuring method for joint deformation. .
The technical scheme of the invention is as follows:
a structural joint deformation monitoring device comprises a left side structure, a right side structure, a device bottom plate, a fixing bolt, a splicing screw rod, a micrometer gauge measuring rod, a vertical micrometer gauge panel and a transverse micrometer gauge panel; the left side structure and the right side structure are adjacent structures on the same building/structure, and a structural seam exists between the left side structure and the right side structure; the surfaces of the left side structure and the right side structure are respectively provided with the device bottom plate; the fixing bolts are used for fixing the device bottom plate on the left side structure and the right side structure respectively; a vertical dial gauge panel is arranged on the left side structure, and a transverse dial gauge panel is arranged on the right side structure; the vertical dial gauge panel and the transverse dial gauge panel are both provided with micrometer gauge measuring rods in a penetrating manner; a micrometer measuring rod in the vertical micrometer gauge panel is parallel to the structural seam; a micrometer gauge measuring rod in the transverse micrometer gauge panel is perpendicular to the structural seam; a micrometer gauge measuring rod in the transverse micrometer gauge board is connected with the vertical micrometer gauge board through a splicing screw rod; the transverse dial gauge is vertically connected with the right side structure through a splicing screw rod in the vertical direction.
Preferably, the bottom plate of the device is made of a steel plate with a certain thickness, and the steel plate is provided with a certain number of bolt holes. According to the concrete condition of structure, the bottom plate can be fixed on the structure in a mode of bonding the bar planting glue or beating expansion bolts.
Preferably, when the device bottom plate is fixed on the structure in an expansion bolt opening mode, expansion bolts matched with pre-opened bolt holes in the device bottom plate need to be adopted.
Preferably, the amesdial measuring stick is for can freely stretching out and drawing back and can be linked to each other with concatenation screw rod or base nut along the axial on the amesdial, and it passes through fixing nut and concatenation screw rod or base nut to with the structure relatively fixed, when the structure produces and warp, can drive the relative amesdial of measuring stick and produce flexible deformation, the amesdial warp the deformation that reacts the structure according to the measuring stick that the precision measurement arrived.
Preferably, vertical amesdial is the core component of amesdial, and inside contains flexible deformation sensing module of measuring stick, deformation digital display module, temperature humidity measurement module, wireless communication and transmission module, battery module and metal protecting sheathing, and the horizontal one side of metal casing is fixed with a base nut 4, and the measuring stick of the horizontal amesdial of being convenient for is rather than fixed.
Furthermore, according to the structural joint deformation monitoring device, the splicing screw is a hollow screw with a male end and a female end. The splicing of the screw rods and the fixing bolts and other parts is facilitated, and the splicing screw rods are 1cm, 2cm, 3cm and other types.
Furthermore, in the structural joint deformation monitoring device, two ends of the measuring rod of the micrometer are respectively provided with a fixing nut and a measuring rod clamping sleeve; the fixing nut has a closing function. The measuring rod or the supporting rod can be locked and fixed in the base bolt or the splicing screw rod. The protection device of measuring stick clamping sleeve for the amesdial measuring stick protects the measuring stick to receive external disturbance less on the one hand, and on the other hand when not influencing the measuring stick and freely stretch out and draw back, prevents that the measuring stick from taking place to control and rocking and influence measurement accuracy.
Further, according to the structural joint deformation monitoring device, base nuts are arranged on the left side structure and the right side structure respectively, each base nut is provided with two ends, the bottom end of each base nut is fixed in the middle of the bottom plate of the device, and a male screw is arranged at the other end of each base nut; the male screw of the left side structure is connected with the fixing nut, and the male screw of the right side structure is connected with the bottom of the splicing screw rod.
Furthermore, in the seam deformation monitoring device with the structure, a transverse micrometer instrument supporting rod is arranged at the bottom of the transverse micrometer instrument panel, and a fixing nut is arranged at the bottom of the transverse micrometer instrument supporting rod; the top of the splicing screw rod on the structure on the right side is connected with the fixing nut, and the splicing screw rod can be fixed by the fixing nut after the height is adjusted. Preferably, the supporting rod of the transverse micrometer is a solid steel rod
Furthermore, above-mentioned structure seam warp monitoring devices, the left side structure passes through the base nut and connects the concatenation screw rod, and the reconnection fixation nut is connected with the amesdial measuring rod of right side structure at last.
Furthermore, the seam deformation monitoring device with the structure is characterized in that a micrometer digital display screen and a micrometer control button are arranged in the vertical micrometer instrument panel and the transverse micrometer instrument panel.
Preferably, the micrometer digital display screen is a liquid crystal screen arranged on a dial gauge panel, and can display the deformation, temperature and humidity measured by an internal sensing part of the micrometer, and the screen is automatically turned off under the common condition.
Preferably, the dial indicator control button is a control button arranged on the dial indicator panel, and has the functions of manually awakening a display screen, manually measuring, checking historical measurement data and the like.
Furthermore, the seam deformation monitoring device with the structure is characterized in that the free ends of the micrometer gauge measuring rods penetrating through the vertical micrometer gauge panel and the transverse micrometer gauge panel are provided with measuring rod protection pipes, the measuring rod protection pipes are hollow pipes, and the inner diameter of each measuring rod is slightly larger than the outer diameter of each micrometer gauge measuring rod.
Further, the use method of the structural joint deformation monitoring device comprises the following steps:
step 2, measuring the initial slab staggering amount and the opening amount of the left side structure and the right side structure, recording an initial value, and determining the number and the size of the splicing screws required to be used in the transverse direction and the vertical direction according to the measured initial value and the center distance of the positions of the bottom plates of the two devices;
step 4, determining a splicing screw to be installed on the right bottom plate according to the initial slab staggering amount, installing the splicing screw on a base nut on the right side, sleeving a transverse micrometer supporting rod on the right side, sleeving a fixing nut on the fixing nut, extending the fixing nut into the splicing screw on the right side, screwing the fixing nut, and preliminarily fixing the transverse micrometer supporting rod on the splicing screw;
and 9, starting the two dial indicators through dial indicator control buttons, setting initial values of the structural staggering platform and the opening on the platform by means of a built-in communication module, and setting the monitoring frequency of the device to realize automatic monitoring.
Compared with the prior art, the invention has the following beneficial effects:
(1) This measuring device adopts digital amesdial distancer to built-in communication module can real-time recording and store the horizontal wrong platform of structure seam deformation and vertically open the displacement change, and the intelligent platform is uploaded to in the automation, can realize looking over in real time and risk analysis that the structure seam warp, more is favorable to the safety of guarantee structure.
(2) The device realizes measuring the volume of opening and wrong platform volume of structure seam simultaneously, and the digital display screen and the operating button of outfit also can realize observing at the instant deformation of scene, and the operation is simple relatively on the whole, extensive applicability.
(3) The device has the advantages of high precision, small volume, low cost, repeated use and high engineering application value.
Drawings
FIG. 1 is a schematic view of a measuring device and installation of the invention
Wherein: 1 is left side structure, 2 is the right side structure, 3 is the device bottom plate, 4 is the base nut, 5 is fixing bolt, 6 is the concatenation screw rod, 7 is fixing nut, 8 is the amesdial measuring stick, 9 is the measuring stick centre gripping cover, 10 is vertical amesdial board, 11 is horizontal amesdial board, 12 is amesdial digital display screen, 13 is amesdial control button, 14 is the measuring stick protection tube, 15 is horizontal amesdial bracing piece.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example 1
The structural joint deformation monitoring device shown in fig. 1 comprises a left side structure 1, a right side structure 2, a device bottom plate 3, a fixing bolt 5, a splicing screw rod 6, a micrometer measuring rod 8, a vertical micrometer gauge panel 10 and a transverse micrometer gauge panel 11; the left side structure 1 and the right side structure 2 are adjacent structures on the same building/structure, and a structural seam exists between the left side structure and the right side structure; the surfaces of the left side structure 1 and the right side structure 2 are respectively provided with the device bottom plate 3; the fixing bolts 5 fix the device bottom plate 3 on the left side structure 1 and the right side structure 2 respectively; a vertical dial gauge 10 is arranged on the left side structure 1, and a transverse dial gauge 11 is arranged on the right side structure 2; the vertical dial gauge panel 10 and the transverse dial gauge panel 11 are both provided with the dial gauge measuring rod 8 in a penetrating manner; a micrometer gauge measuring rod 8 in the vertical micrometer gauge panel 10 is parallel to the structural seam; a micrometer gauge measuring rod 8 in the transverse micrometer gauge panel 11 is perpendicular to the structural seam; a micrometer gauge measuring rod 8 in the transverse micrometer gauge panel 11 is connected with the vertical micrometer gauge panel 10 through a splicing screw rod 6; the transverse dial gauge 11 is vertically connected with the right structure 2 through a splicing screw 6 in the vertical direction.
Example 2
The structural joint deformation monitoring device shown in fig. 1 comprises a left side structure 1, a right side structure 2, a device bottom plate 3, a fixing bolt 5, a splicing screw rod 6, a micrometer measuring rod 8, a vertical micrometer gauge panel 10 and a transverse micrometer gauge panel 11; the left side structure 1 and the right side structure 2 are adjacent structures on the same building/structure, and a structural seam exists between the left side structure and the right side structure; the surfaces of the left side structure 1 and the right side structure 2 are respectively provided with the device bottom plate 3; the fixing bolts 5 fix the device bottom plate 3 on the left side structure 1 and the right side structure 2 respectively; a vertical dial gauge 10 is arranged on the left side structure 1, and a transverse dial gauge 11 is arranged on the right side structure 2; the vertical micrometer gauge panel 10 and the transverse micrometer gauge panel 11 are respectively penetrated with the micrometer gauge measuring rod 8; a micrometer measuring rod 8 in the vertical micrometer instrument panel 10 is parallel to the structural seam; a micrometer gauge measuring rod 8 in the transverse micrometer gauge panel 11 is perpendicular to the structural seam; a micrometer gauge measuring rod 8 in the transverse micrometer gauge panel 11 is connected with the vertical micrometer gauge panel 10 through a splicing screw rod 6; the transverse dial gauge panel 11 is vertically connected with the right side structure 2 through a splicing screw 6 in the vertical direction; preferably, the splicing screw 6 is a hollow screw with a male end at one end and a female end at the other end; particularly, two ends of the measuring rod 8 of the micrometer are respectively provided with a fixing nut 7 and a measuring rod clamping sleeve 9; the fixing screw cap 7 has a closing function; further, base nuts 4 are arranged on the left side structure 1 and the right side structure 2, the base nuts 4 are provided with two ends, the bottom ends of the base nuts 4 are fixed in the middle of the device bottom plate 3, and male screws are arranged at the other ends of the base nuts; the male screw of the left structure 1 is connected with a fixing nut 7, and the male screw of the right structure 2 is connected with the bottom of the splicing screw 6; preferably, a transverse micrometer supporting rod 15 is arranged at the bottom of the transverse micrometer gauge 11, and a fixing nut 7 is arranged at the bottom of the transverse micrometer supporting rod 15; is connected with the top of a splicing screw 6 on the right side structure 2 through a fixing nut 7; optionally, the left side structure 1 is connected with the splicing screw 6 through the base nut 4, then connected with the fixing nut 7, and finally connected with the micrometer measuring rod 8 of the right side structure 2; further, a micrometer digital display screen 12 and a micrometer control button 13 are arranged in each of the vertical micrometer gauge panel 10 and the transverse micrometer gauge panel 11; preferably, a measuring rod protection tube 14 is arranged at the free end of the micrometer measuring rod 8 penetrating through the vertical micrometer gauge panel 10 and the transverse micrometer gauge panel 11, the measuring rod protection tube 14 is a hollow tube, and the inner diameter of the hollow tube is slightly larger than the outer diameter of the micrometer measuring rod 8.
The use method of the structural joint deformation monitoring device comprises the following steps:
step 2, measuring the initial slab staggering amount and the opening amount of the left side structure 1 and the right side structure 2, making initial value records, and determining the number and the size of the splicing screws 6 required to be used in the horizontal direction and the vertical direction according to the measured initial values and the center distance of the positions of the two device bottom plates 3;
step 4, determining a splicing screw 6 required to be installed on the right bottom plate according to the initial slab staggering amount, installing the splicing screw on the right base nut 4, sleeving the right transverse micrometer supporting rod 15 on the fixing nut 7, extending into the right splicing screw 6, screwing the fixing nut 7, and preliminarily fixing the transverse micrometer supporting rod 15 on the splicing screw 6;
and 9, starting the two dial gauges through the dial gauge control button 13, setting a structural staggering platform and an opening initial value on the platform by means of a built-in communication module, and setting the monitoring frequency of the device to realize automatic monitoring.
As can be seen from the above-mentioned embodiments,
(1) This measuring device adopts digital amesdial to built-in communication module can real-time recording and store the horizontal wrong platform of structure seam deformation and vertically open the displacement change, and the intelligent platform is reached in the automatic upload, can realize that the structure seam warp look over in real time and risk analysis, more is favorable to the safety of guarantee structure.
(2) The device realizes measuring the volume of opening and wrong platform volume of structure seam simultaneously, and the digital display screen and the operating button of outfit also can realize observing at the instant deformation of scene, and the operation is relatively simple on the whole, extensive applicability.
(3) The device has the advantages of high precision, small volume, low cost, repeated use and high engineering application value.
The invention solves the technical problems of single function, lower measurement precision, lower working efficiency and higher cost of the existing measuring tool and measuring method for the joint deformation.
The above are only preferred embodiments of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the summary of the invention should be covered by the protection scope of the present patent application.
Claims (9)
1. A structural joint deformation monitoring device is characterized by comprising a left side structure (1), a right side structure (2), a device bottom plate (3), a fixing bolt (5), a splicing screw (6), a micrometer measuring rod (8), a vertical micrometer gauge panel (10) and a transverse micrometer gauge panel (11); the left side structure (1) and the right side structure (2) are adjacent structures on the same building/structure, and a structural seam exists between the left side structure and the right side structure; the surfaces of the left side structure (1) and the right side structure (2) are respectively provided with the device bottom plate (3); the fixing bolt (5) is used for fixing the device bottom plate (3) on the left side structure (1) and the right side structure (2) respectively; a vertical dial gauge panel (10) is arranged on the left side structure (1), and a transverse dial gauge panel (11) is arranged on the right side structure (2); the vertical dial gauge panel (10) and the transverse dial gauge panel (11) are respectively penetrated with the dial gauge measuring rod (8); a micrometer gauge measuring rod (8) in the vertical micrometer gauge board (10) is parallel to the structural seam; a micrometer gauge measuring rod (8) in the transverse micrometer gauge board (11) is perpendicular to the structural seam; a dial indicator measuring rod (8) in the transverse dial indicator panel (11) is connected with the vertical dial indicator panel (10) through a splicing screw rod (6); the transverse dial gauge panel (11) is vertically connected with the right side structure (2) through a splicing screw rod (6) in the vertical direction.
2. A structural joint deformation monitoring device according to claim 1, wherein the splicing screw (6) is a hollow screw with a male end and a female end.
3. A structural joint deformation monitoring device according to claim 2, characterized in that both ends of the micrometer gauge measuring rod (8) are respectively provided with a fixing nut (7) and a measuring rod clamping sleeve (9); the fixing screw cap (7) has a closing function.
4. A structural joint deformation monitoring device according to claim 3, wherein the left side structure (1) and the right side structure (2) are provided with base nuts (4), the base nuts (4) have two ends, the bottom end is fixed in the middle of the device bottom plate (3), and the other end is provided with a male screw; the male screw of the left side structure (1) is connected with the fixing nut (7), and the male screw of the right side structure (2) is connected with the bottom of the splicing screw rod (6).
5. A structural joint deformation monitoring device according to claim 4, characterized in that a transverse micrometer gauge support rod (15) is arranged at the bottom of the transverse micrometer gauge panel (11), and a fixing nut (7) is arranged at the bottom of the transverse micrometer gauge support rod (15); is connected with the top of the splicing screw (6) on the right side structure (2) through a fixing nut (7).
6. A structural joint deformation monitoring device according to claim 5, characterized in that the left side structure (1) is connected with the splicing screw (6) through the base nut (4), then connected with the fixing nut (7), and finally connected with the micrometer measuring rod (8) of the right side structure (2).
7. A structural joint deformation monitoring device according to claim 6, characterized in that a micrometer digital display screen (12) and a micrometer control button (13) are arranged in both the vertical micrometer gauge panel (10) and the transverse micrometer gauge panel (11).
8. A structural joint deformation monitoring device according to claim 7, characterized in that the free ends of the micrometer gauge measuring rods (8) penetrating through the vertical micrometer gauge panel (10) and the transverse micrometer gauge panel (11) are provided with measuring rod protection tubes (14), the measuring rod protection tubes (14) are hollow tubes, and the inner diameter of the hollow tubes is slightly larger than the outer diameter of the micrometer gauge measuring rods (8).
9. A method of using a structural joint deformation monitoring device according to claim 8, comprising the steps of:
step 1, cleaning corresponding surfaces of a left side structure (1) and a right side structure (2) according to the position of a structural joint to be detected, positioning the installation positions of device bottom plates (3) on the two structures, and ensuring that the axes of the two bottom plates are overlapped in the direction perpendicular to the structural joint;
step 2, measuring the initial slab staggering amount and the opening amount of the left side structure (1) and the right side structure (2), recording an initial value, and determining the number and the size of splicing screws (6) required to be used in the transverse direction and the vertical direction according to the measured initial value and the center distance of the positions of the two device bottom plates (3);
step 3, adopting bar-planting glue or fixing bolts (5) to respectively mount the two device bottom plates (3) at the structurally positioned mounting positions;
step 4, determining a splicing screw (6) to be installed on the right bottom plate according to the initial slab staggering amount, installing the splicing screw on the right base nut (4), sleeving the right transverse dial indicator supporting rod (15) on the fixing nut (7) to stretch into the right splicing screw (6), screwing the fixing nut (7), and preliminarily fixing the transverse dial indicator supporting rod (15) on the splicing screw (6);
step 5, sleeving a dial indicator measuring rod (8) of the left vertical dial indicator on a fixing nut (7) and extending into a base nut (4) on the left bottom plate, and after the height is roughly adjusted, rotating the fixing nut (7) on the left side to fix the fixing nut on the left side preliminarily;
step 6, installing a determined splicing screw rod (6) on a base nut (4) on the right side of a vertical dial gauge panel (10) on the left side, sleeving a dial gauge measuring rod (8) of a transverse dial gauge panel (11) on the right side with a fixing nut (7) extending into the splicing screw rod, and after the distance is roughly adjusted, prohibiting the fixing nut (7) on the upper part to fix the splicing screw rod preliminarily;
step 8, finely adjusting the whole measuring device through fixing nuts (7) at 3 positions to prevent deflection and bending from influencing measuring precision;
and 9, starting the two dial indicators through a dial indicator control button (13), setting initial values of the structural staggering platform and the opening on the platform by means of a built-in communication module, and setting the monitoring frequency of the device to realize automatic monitoring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211345142.2A CN115682889A (en) | 2022-10-31 | 2022-10-31 | Structural joint deformation monitoring device and using method |
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| CN202211345142.2A CN115682889A (en) | 2022-10-31 | 2022-10-31 | Structural joint deformation monitoring device and using method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119509304A (en) * | 2025-01-21 | 2025-02-25 | 中建五局第四建设有限公司 | Building construction measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119509304A (en) * | 2025-01-21 | 2025-02-25 | 中建五局第四建设有限公司 | Building construction measuring device |
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