JPH0346589U - - Google Patents
Info
- Publication number
- JPH0346589U JPH0346589U JP10694389U JP10694389U JPH0346589U JP H0346589 U JPH0346589 U JP H0346589U JP 10694389 U JP10694389 U JP 10694389U JP 10694389 U JP10694389 U JP 10694389U JP H0346589 U JPH0346589 U JP H0346589U
- Authority
- JP
- Japan
- Prior art keywords
- kelly bar
- groove
- torque
- cylindrical
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000009412 basement excavation Methods 0.000 claims 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10694389U JPH0527590Y2 ( ) | 1989-09-12 | 1989-09-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10694389U JPH0527590Y2 ( ) | 1989-09-12 | 1989-09-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0346589U true JPH0346589U ( ) | 1991-04-30 |
| JPH0527590Y2 JPH0527590Y2 ( ) | 1993-07-14 |
Family
ID=31655663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10694389U Expired - Lifetime JPH0527590Y2 ( ) | 1989-09-12 | 1989-09-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0527590Y2 ( ) |
-
1989
- 1989-09-12 JP JP10694389U patent/JPH0527590Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0527590Y2 ( ) | 1993-07-14 |
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