CN111546442A - Prepressing method and device for flame-retardant plate production - Google Patents
Prepressing method and device for flame-retardant plate production Download PDFInfo
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- CN111546442A CN111546442A CN202010393864.XA CN202010393864A CN111546442A CN 111546442 A CN111546442 A CN 111546442A CN 202010393864 A CN202010393864 A CN 202010393864A CN 111546442 A CN111546442 A CN 111546442A
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- workstation
- shaft
- connecting rod
- retardant plate
- plate according
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 50
- 238000001125 extrusion Methods 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 8
- 206010020649 Hyperkeratosis Diseases 0.000 claims description 6
- 238000005056 compaction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 210000003437 trachea Anatomy 0.000 claims 4
- 238000009826 distribution Methods 0.000 claims 1
- 239000002023 wood Substances 0.000 description 5
- 230000007306 turnover Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
- B27D1/083—Presses specially designed for making the manufacture of shaped plywood articles
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses a prepressing method and a prepressing device for flame retardant plate production, which comprise a workbench, wherein a chute is formed in the workbench, a connecting rod is arranged in the chute, a rotating motor is arranged at one end of the connecting rod, the other end of the connecting rod is connected with an upper pressing shaft, a mounting frame is arranged on the rotating motor and is buckled and connected with the workbench, the upper pressing shaft is arranged in the chute, the mounting frame is connected with the workbench in a sliding and lifting manner, a locking button is arranged on the mounting frame, and the mounting frame is fixedly connected with the workbench in a locking manner through the locking button. The sliding groove is formed in the workbench of the prepressing method and device for producing the flame retardant plate, the connecting rod is arranged in the sliding groove, the upper pressing shaft, the lower pressing shaft and the rotating motor are respectively mounted at two ends of the connecting rod, the mounting frame is arranged on the rotating motor and is in sliding connection with the workbench, and the locking button is arranged on the mounting frame, so that the lower pressing shaft and the upper pressing shaft of the device can be connected in a lifting mode, and the device is convenient to fix and more convenient to use.
Description
Technical Field
The invention relates to the technical field of production of flame-retardant plates, in particular to a prepressing method and a prepressing device for production of a flame-retardant plate.
Background
The fire-retardant board, also known as fire-retardant board, fire-retardant plywood, etc. is a three-layer or multi-layer plywood made up by using log through the processes of rotary cutting to obtain wood chips or planing to obtain small wood blocks, fire-retarding treatment of wood chips and gluing them with adhesive, and is made up by using odd layers of wood chips and making the fibre directions of adjacent layers of wood chips mutually perpendicular and gluing them together. Since the flame retardant sheet needs to be glued by an adhesive, a pre-pressing process is required, and a pre-pressing device is required for pre-pressing.
The conventional prepressing device for producing the flame-retardant plate is CN201820164853.2, when the device is used, a pressing shaft is inconvenient to adjust, and the device is inconvenient to use, and the conventional prepressing method and the device for producing the flame-retardant plate achieve the purpose of convenient adjustment.
Disclosure of Invention
The invention aims to provide a prepressing method and a prepressing device for producing a flame-retardant plate, which are used for solving the problems that a pressing shaft is inconvenient to adjust and use when the flame-retardant plate is used in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a fire-retardant board production is with pre-compaction method and device, includes the workstation, be equipped with the conveyer belt on the workstation, and be equipped with the last pressure shaft on the conveyer belt, be equipped with down the pressure shaft in the conveyer belt, the workstation lower extreme is equipped with the support base, the spout has been seted up on the workstation, and is equipped with the connecting rod in the spout, connecting rod one end is equipped with the rotating electrical machines, and the connecting rod other end is connected with last pressure shaft, be equipped with the mounting bracket on the rotating electrical machines, and the mounting bracket is connected with the workstation lock, go up the pressure shaft and be the slip lift with the mounting bracket in the spout and be connected, and be equipped with the locking button on the mounting.
Preferably, workstation one side is equipped with the baffle, and the baffle is upset swing joint through pivot and workstation, be equipped with first magnetic force piece on the baffle, and the baffle is magnetic force fixed connection through first magnetic force piece and workstation, the shape phase-match of the shape of baffle and workstation opposite side.
Preferably, the steam box is arranged on the workbench, the installation cover is arranged on the steam box, the installation cover is connected with the steam box in a turnover sealing mode through the connecting hinge, and the steam box is distributed on the workbench in a symmetrical position.
Preferably, a suction pump is arranged on the steam box, a connecting conduit is arranged at the other end of the suction pump, and the other end of the connecting conduit is respectively communicated and connected with the upper pressing shaft and the lower pressing shaft.
Preferably, the inner walls of the lower pressing shaft and the upper pressing shaft are provided with extrusion blocks, springs are arranged at the other ends of the extrusion blocks, the other ends of the springs are connected with the connecting rod, the connecting rod is elastically and flexibly connected with the extrusion blocks through the springs, and the lower pressing shaft and the upper pressing shaft are fixedly connected with the connecting rod in an extrusion mode through the extrusion blocks.
Preferably, be equipped with the screw rod on lower last pressure shaft of last pressure shaft, and be equipped with the fixed disk on the screw rod, the fixed disk is spiral telescopic connection through screw rod and lower pressure shaft and last pressure shaft, and the fixed disk is connected with lower pressure shaft and last pressure shaft block.
Preferably, through holes are formed in the lower pressing shaft and the upper pressing shaft and are distributed in equidistant annular positions on the lower pressing shaft and the upper pressing shaft.
Preferably, the support base lower extreme is equipped with the ball, and the ball is spherical structure, the ball is evenly positioned to distribute on supporting the base, and is equipped with the support callus on the sole on the support base, it is equipped with flexible groove to support the callus on the sole outer wall, and supports the callus on the sole and be spiral lift connection through flexible groove and support base.
Preferably, the two sides of the supporting base are provided with second magnetic blocks, and the supporting base is fixedly connected with the supporting base through the second magnetic blocks in a magnetic manner.
Preferably, a main air pipe is arranged in the connecting rod, an air nozzle is arranged on the main air pipe, the air nozzles are distributed at the main air pipe in an equidistant annular position, and the main air pipe is communicated and connected with the connecting conduit.
Compared with the prior art, the invention has the beneficial effects that: the sliding groove is formed in the workbench of the prepressing method and device for producing the flame retardant plate, the connecting rod is arranged in the sliding groove, the upper pressing shaft, the lower pressing shaft and the rotating motor are respectively mounted at two ends of the connecting rod, the mounting frame is arranged on the rotating motor and is in sliding connection with the workbench, and the locking button is arranged on the mounting frame, so that the lower pressing shaft and the upper pressing shaft of the device can be connected in a lifting mode, and the device is convenient to fix and more convenient to use.
Drawings
FIG. 1 is a front view of a pre-pressing method and apparatus for producing a fire retardant board according to the present invention;
FIG. 2 is a cross-sectional view of a pre-pressing method and apparatus for producing a fire retardant board according to the present invention;
FIG. 3 is a schematic view of the connection between the main air pipe and the connecting rod of the pre-pressing method and device for producing the flame retardant plate of the present invention;
FIG. 4 is a schematic view of the connection between the extrusion block and the connecting rod of the prepressing method and apparatus for producing a fire retardant plate of the present invention;
FIG. 5 is a schematic view of the connection between the baffle and the worktable of the prepressing method and device for producing a flame retardant board of the present invention;
FIG. 6 is a schematic view of the connection between the pressing shaft and the fixing plate in the pre-pressing method and device for producing a flame retardant plate.
In the figure: 1. the steam box comprises a workbench, 2, an upper pressure shaft, 3, a steam box, 4, a lower pressure shaft, 5, a supporting base, 6, a conveying belt, 7, a connecting hinge, 8, an installing cover, 9, a suction pump, 10, a connecting conduit, 11, a telescopic groove, 12, a supporting foot pad, 13, a ball, 14, a sliding groove, 15, an air nozzle, 16, a main air guide pipe, 17, a connecting rod, 18, a locking button, 19, an installing frame, 20, a rotating motor, 21, an extrusion block, 22, a through hole, 23, a spring, 24, a first magnetic block, 25, a baffle, 26, a rotating shaft, 27, a screw rod, 28, a fixed disk, 29 and a second magnetic block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: a prepressing method and a prepressing device for producing a flame retardant plate comprise a workbench 1, an upper pressing shaft 2, a steam box 3, a lower pressing shaft 4, a supporting base 5, a conveyor belt 6, a connecting hinge 7, an installation cover 8, a suction pump 9, a connecting conduit 10, a telescopic groove 11, a supporting foot pad 12, balls 13, a chute 14, an air nozzle 15, a main air guide pipe 16, a connecting rod 17, a locking button 18, an installation frame 19, a rotating motor 20, an extrusion block 21, a through hole 22, a spring 23, a first magnetic block 24, a baffle 25, a rotating shaft 26, a screw 27, a fixed disk 28 and a second magnetic block 29, wherein the conveyor belt 6 is arranged on the workbench 1, the upper pressing shaft 2 is arranged on the conveyor belt 6, the baffle 25 is arranged on one side of the workbench 1, the baffle 25 is connected with the workbench 1 in a turnover and movable manner through the rotating shaft 26, the baffle 25 is provided with the first magnetic block 24, and the baffle 25 is fixedly connected with, the shape of the baffle 25 is matched with that of the other side of the workbench 1, so that the baffle 25 of the device is convenient to open and fix, the steam box 3 is arranged on the workbench 1, the steam box 3 is provided with the installation cover 8, the installation cover 8 is connected with the steam box 3 in a turnover sealing manner through the connecting hinge 7, the steam boxes 3 are distributed on the workbench 1 in a symmetrical position, so that the steam box 3 of the device is convenient to inject water, the conveyor belt 6 is internally provided with the lower pressing shaft 4, the lower end of the workbench 1 is provided with the supporting base 5, the inner walls of the lower pressing shaft 4 and the upper pressing shaft 2 are provided with the extrusion blocks 21, the other ends of the extrusion blocks 21 are provided with springs 23, the other ends of the springs 23 are connected with the connecting rod 17, the connecting rod 17 is in elastic telescopic movable connection with the extrusion blocks 21 through the springs 23, the lower pressing shaft 4 and the upper pressing shaft 2 are in extrusion fixed connection with the connecting rod 17 through the extrusion blocks 21, the lower pressure shaft 4 and the upper pressure shaft 2 are provided with screw rods 27, the screw rods 27 are provided with fixed discs 28, the fixed discs 28 are spirally and telescopically connected with the lower pressure shaft 4 and the upper pressure shaft 2 through the screw rods 27, and the fixed discs 28 are clamped and connected with the lower pressure shaft 4 and the upper pressure shaft 2, so that the lower pressure shaft 4 and the upper pressure shaft 2 of the device are more stably installed, through holes 22 are formed in the lower pressure shaft 4 and the upper pressure shaft 2, and the through holes 22 are distributed on the lower pressure shaft 4 and the upper pressure shaft 2 at equal-spaced annular positions, so that the lower pressure shaft 4 and the upper pressure shaft 2 of the device can spray steam to facilitate prepressing, the lower end of the support base 5 is provided with ball bearings 13, the ball bearings 13 are of a spherical structure, the ball bearings 13 are uniformly distributed on the support base 5, the support base 5 is provided with support foot pads 12, the outer wall of the support foot pads 12 is provided with telescopic grooves 11, and the support foot pads 12 are spirally, thus, the device is more flexible to move and convenient to fix, the second magnetic blocks 29 are arranged on two sides of the supporting base 5, the supporting bases 5 are fixedly connected through the second magnetic blocks 29 in a magnetic manner, the device can be fixedly connected in a magnetic splicing manner, the use is more convenient, the sliding groove 14 is formed in the workbench 1, the connecting rod 17 is arranged in the sliding groove 14, the main air pipe 16 is arranged in the connecting rod 17, the air nozzles 15 are arranged on the main air pipe 16 and distributed at equal-distance annular positions, the main air pipe 16 is communicated and connected with the connecting conduit 10, the connecting rod 17 of the device is convenient to jet air and is more convenient to use, the rotating motor 20 is arranged at one end of the connecting rod 17, the other end of the connecting rod 17 is connected with the upper pressure shaft 2, the mounting frame 19 is arranged on the rotating motor 20, the mounting frame 19 is connected with the workbench 1 in a buckling manner, the upper pressure shaft 2 is arranged in the sliding groove 14 and the, and be equipped with locking button 18 on the mounting bracket 19, mounting bracket 19 is locking fixed connection through locking button 18 with workstation 1, is equipped with suction pump 9 on the steam chest 3, and the suction pump 9 other end is equipped with connecting tube 10, and the connecting tube 10 other end is the intercommunication with last pressure shaft 2 and lower pressure shaft 4 respectively and is connected, makes the device make things convenient for the transportation of steam like this, and it is more convenient to use.
The working principle is as follows: when the prepressing method and the prepressing device for producing the flame retardant board are used, firstly, the device is taken out, then the device is moved through the balls 13 at the bottom of the device, then the upper pressing shaft 2 and the lower pressing shaft 4 of the device are lifted through the matching of the mounting rack 19, the sliding chute 14 and the connecting rod 17, so that the lower pressing shaft 4 is inserted into the middle of the conveyor belt 6, then the device is connected with a power supply, then the conveyor belt 6 of the device is started to drive the material to be transported, the rotating motor 20 of the device is started to drive the upper pressing shaft 2 and the lower pressing shaft 4 to rotate through the connecting rod 17, the suction pump 9 of the device is started, the steam in the steam box 3 is sent into the main air pipe 16 through the connecting conduit 10 and then is sprayed out through the air spraying opening 15 and then is sprayed out through the through holes 22 on the upper pressing shaft 2 and the lower pressing shaft 4, when the material passes through the upper pressing shaft 2, will be squeezed and through the steam shaping, and when the device is worked, can close baffle 25 through pivot 26, and fix through first magnetic block 24, and when the device needs to be changed upper pressure axle 2 and lower pressure axle 4, can unscrew fixed disk 28 through screw 27, then upper pressure axle 2 and lower pressure axle 4 are taken out, change, and steam chest 3 of the device can be through installing lid 8 water injection, and it is more convenient to use, this is the pre-compaction method for fire retardant board production and the use process of device.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a fire-retardant board production is with pre-compaction method and device, includes workstation (1), be equipped with conveyer belt (6) on workstation (1), and be equipped with last beam (2) on conveyer belt (6), be equipped with down in conveyer belt (6) and push down axle (4), workstation (1) lower extreme is equipped with support base (5), its characterized in that: seted up spout (14) on workstation (1), and be equipped with connecting rod (17) in spout (14), connecting rod (17) one end is equipped with rotating electrical machines (20), and the connecting rod (17) other end is connected with last pressure shaft (2), be equipped with mounting bracket (19) on rotating electrical machines (20), and mounting bracket (19) are connected with workstation (1) lock, it is connected with workstation (1) slide lift with mounting bracket (19) in spout (14) to go up pressure shaft (2), and is equipped with locking button (18) on mounting bracket (19), mounting bracket (19) are locking fixed connection through locking button (18) with workstation (1).
2. The prepressing method and device for producing fire retardant plate according to claim 1, wherein: workstation (1) one side is equipped with baffle (25), and baffle (25) are upset swing joint through pivot (26) and workstation (1), be equipped with first magnetic force piece (24) on baffle (25), and baffle (25) are magnetic force fixed connection through first magnetic force piece (24) and workstation (1), the shape phase-match of the shape of baffle (25) and workstation (1) opposite side.
3. The prepressing method and device for producing fire retardant plate according to claim 1, wherein: be equipped with steam chest (3) on workstation (1), and be equipped with installation lid (8) on steam chest (3), installation lid (8) are upset sealing connection through connecting loose-leaf (7) and steam chest (3), and steam chest (3) are the symmetric position and distribute on workstation (1).
4. The prepressing method and device for producing fire retardant plate according to claim 3, wherein: be equipped with suction pump (9) on steam chest (3), and the suction pump (9) other end is equipped with connecting tube (10), the connecting tube (10) other end is the intercommunication with last push shaft (2) and push down axle (4) respectively and is connected.
5. The prepressing method and device for producing fire retardant plate according to claim 1, wherein: lower last pressure shaft (2) inner wall is equipped with extrusion piece (21), and extrudees the piece (21) other end and is equipped with spring (23), the spring (23) other end is connected with connecting rod (17), and connecting rod (17) are the flexible swing joint of elasticity through spring (23) and extrusion piece (21), lower last pressure shaft (4) and last pressure shaft (2) are extrusion fixed connection through extrusion piece (21) and connecting rod (17).
6. The prepressing method and device for producing fire retardant plate according to claim 1, wherein: be equipped with screw rod (27) on push shaft (4) and last push shaft (2) down, and be equipped with fixed disk (28) on screw rod (27), fixed disk (28) are spiral telescopic connection through screw rod (27) and push shaft (4) and last push shaft (2) down, and fixed disk (28) are connected with push shaft (4) and last push shaft (2) block down.
7. The prepressing method and device for producing fire retardant plate according to claim 1, wherein: through holes (22) are formed in the lower pressing shaft (4) and the upper pressing shaft (2), and the through holes (22) are distributed on the lower pressing shaft (4) and the upper pressing shaft (2) at equal intervals in annular positions.
8. The prepressing method and device for producing fire retardant plate according to claim 1, wherein: support base (5) lower extreme and be equipped with ball (13), and ball (13) are spherical structure, ball (13) are evenly positioned and distribute on supporting base (5), and are equipped with on supporting base (5) and support callus on the sole (12), it is equipped with flexible groove (11) to support callus on the sole (12) outer wall, and supports callus on the sole (12) and be spiral lift through flexible groove (11) and support base (5) and be connected.
9. The prepressing method and device for producing fire retardant plate according to claim 1, wherein: support base (5) both sides and be equipped with second magnetic force piece (29), and support and be magnetic force fixed connection through second magnetic force piece (29) between base (5).
10. The prepressing method and device for producing fire retardant plate according to claim 1, wherein: be equipped with main trachea (16) in connecting rod (17), and be equipped with air jet (15) on main trachea (16), air jet (15) are equidistance annular position distribution in main trachea (16), and main trachea (16) are connected with connecting tube (10) intercommunication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010393864.XA CN111546442A (en) | 2020-05-11 | 2020-05-11 | Prepressing method and device for flame-retardant plate production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010393864.XA CN111546442A (en) | 2020-05-11 | 2020-05-11 | Prepressing method and device for flame-retardant plate production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111546442A true CN111546442A (en) | 2020-08-18 |
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ID=71996572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010393864.XA Pending CN111546442A (en) | 2020-05-11 | 2020-05-11 | Prepressing method and device for flame-retardant plate production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111546442A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI945813A (en) * | 1993-12-11 | 1995-06-12 | Siempelkamp Gmbh & Co | Continuous press for the production of particle board, fiber and laminate boards or corresponding press material sheets |
| CN201385344Y (en) * | 2009-04-02 | 2010-01-20 | 赵书忠 | Veneer-overlapping guillotine shear |
| CN103934867A (en) * | 2014-05-16 | 2014-07-23 | 南京林业大学 | Joint preheating hot-pressing method for continuously forming large-sized scrimber |
| CN206306956U (en) * | 2016-12-20 | 2017-07-07 | 东莞市粤熙实业有限公司 | A video camera for unmanned cars that is easy to disassemble |
| CN107875562A (en) * | 2017-11-27 | 2018-04-06 | 戴震班 | A kind of multi-functional training combines horizontal bar |
-
2020
- 2020-05-11 CN CN202010393864.XA patent/CN111546442A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI945813A (en) * | 1993-12-11 | 1995-06-12 | Siempelkamp Gmbh & Co | Continuous press for the production of particle board, fiber and laminate boards or corresponding press material sheets |
| CN201385344Y (en) * | 2009-04-02 | 2010-01-20 | 赵书忠 | Veneer-overlapping guillotine shear |
| CN103934867A (en) * | 2014-05-16 | 2014-07-23 | 南京林业大学 | Joint preheating hot-pressing method for continuously forming large-sized scrimber |
| CN206306956U (en) * | 2016-12-20 | 2017-07-07 | 东莞市粤熙实业有限公司 | A video camera for unmanned cars that is easy to disassemble |
| CN107875562A (en) * | 2017-11-27 | 2018-04-06 | 戴震班 | A kind of multi-functional training combines horizontal bar |
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Application publication date: 20200818 |