JPH03119092U - - Google Patents
Info
- Publication number
- JPH03119092U JPH03119092U JP2667590U JP2667590U JPH03119092U JP H03119092 U JPH03119092 U JP H03119092U JP 2667590 U JP2667590 U JP 2667590U JP 2667590 U JP2667590 U JP 2667590U JP H03119092 U JPH03119092 U JP H03119092U
- Authority
- JP
- Japan
- Prior art keywords
- kelly bar
- bar
- kelly
- torque
- protrusion
- 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
- 238000009412 basement excavation Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2667590U JPH03119092U (en]) | 1990-03-16 | 1990-03-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2667590U JPH03119092U (en]) | 1990-03-16 | 1990-03-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03119092U true JPH03119092U (en]) | 1991-12-09 |
Family
ID=31529555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2667590U Pending JPH03119092U (en]) | 1990-03-16 | 1990-03-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03119092U (en]) |
-
1990
- 1990-03-16 JP JP2667590U patent/JPH03119092U/ja active Pending