JPH03123612U - - Google Patents
Info
- Publication number
- JPH03123612U JPH03123612U JP3301790U JP3301790U JPH03123612U JP H03123612 U JPH03123612 U JP H03123612U JP 3301790 U JP3301790 U JP 3301790U JP 3301790 U JP3301790 U JP 3301790U JP H03123612 U JPH03123612 U JP H03123612U
- Authority
- JP
- Japan
- Prior art keywords
- gripped
- gun drill
- pipe
- tip
- gripped part
- 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
- 238000005553 drilling Methods 0.000 claims 1
- 230000003746 surface roughness Effects 0.000 claims 1
Landscapes
- Drilling Tools (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3301790U JPH03123612U (zh) | 1990-03-29 | 1990-03-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3301790U JPH03123612U (zh) | 1990-03-29 | 1990-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03123612U true JPH03123612U (zh) | 1991-12-16 |
Family
ID=31536349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3301790U Pending JPH03123612U (zh) | 1990-03-29 | 1990-03-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03123612U (zh) |
-
1990
- 1990-03-29 JP JP3301790U patent/JPH03123612U/ja active Pending