JPH0257306U - - Google Patents
Info
- Publication number
- JPH0257306U JPH0257306U JP13806488U JP13806488U JPH0257306U JP H0257306 U JPH0257306 U JP H0257306U JP 13806488 U JP13806488 U JP 13806488U JP 13806488 U JP13806488 U JP 13806488U JP H0257306 U JPH0257306 U JP H0257306U
- Authority
- JP
- Japan
- Prior art keywords
- vertical direction
- helical
- drive part
- spiral
- excavation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13806488U JPH0257306U (cs) | 1988-10-21 | 1988-10-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13806488U JPH0257306U (cs) | 1988-10-21 | 1988-10-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0257306U true JPH0257306U (cs) | 1990-04-25 |
Family
ID=31400057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13806488U Pending JPH0257306U (cs) | 1988-10-21 | 1988-10-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0257306U (cs) |
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1988
- 1988-10-21 JP JP13806488U patent/JPH0257306U/ja active Pending