JPH0439349Y2 - - Google Patents
Info
- Publication number
- JPH0439349Y2 JPH0439349Y2 JP6531587U JP6531587U JPH0439349Y2 JP H0439349 Y2 JPH0439349 Y2 JP H0439349Y2 JP 6531587 U JP6531587 U JP 6531587U JP 6531587 U JP6531587 U JP 6531587U JP H0439349 Y2 JPH0439349 Y2 JP H0439349Y2
- Authority
- JP
- Japan
- Prior art keywords
- drill rod
- ring
- rod
- port
- drill
- 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.)
- Expired
Links
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6531587U JPH0439349Y2 (2) | 1987-05-01 | 1987-05-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6531587U JPH0439349Y2 (2) | 1987-05-01 | 1987-05-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63176193U JPS63176193U (2) | 1988-11-15 |
| JPH0439349Y2 true JPH0439349Y2 (2) | 1992-09-14 |
Family
ID=30902270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6531587U Expired JPH0439349Y2 (2) | 1987-05-01 | 1987-05-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0439349Y2 (2) |
-
1987
- 1987-05-01 JP JP6531587U patent/JPH0439349Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63176193U (2) | 1988-11-15 |
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