JPS63201007U - - Google Patents
Info
- Publication number
- JPS63201007U JPS63201007U JP9182987U JP9182987U JPS63201007U JP S63201007 U JPS63201007 U JP S63201007U JP 9182987 U JP9182987 U JP 9182987U JP 9182987 U JP9182987 U JP 9182987U JP S63201007 U JPS63201007 U JP S63201007U
- Authority
- JP
- Japan
- Prior art keywords
- drilling
- drill
- ring
- protrusion
- depth
- 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 description 5
- 238000000034 method Methods 0.000 description 1
Landscapes
- Drilling And Boring (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9182987U JPS63201007U (cs) | 1987-06-15 | 1987-06-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9182987U JPS63201007U (cs) | 1987-06-15 | 1987-06-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63201007U true JPS63201007U (cs) | 1988-12-26 |
Family
ID=30952968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9182987U Pending JPS63201007U (cs) | 1987-06-15 | 1987-06-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63201007U (cs) |
-
1987
- 1987-06-15 JP JP9182987U patent/JPS63201007U/ja active Pending