JPS61198391U - - Google Patents
Info
- Publication number
- JPS61198391U JPS61198391U JP8286385U JP8286385U JPS61198391U JP S61198391 U JPS61198391 U JP S61198391U JP 8286385 U JP8286385 U JP 8286385U JP 8286385 U JP8286385 U JP 8286385U JP S61198391 U JPS61198391 U JP S61198391U
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- bit
- core
- recess
- end surface
- 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 3
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8286385U JPS61198391U (en18) | 1985-05-31 | 1985-05-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8286385U JPS61198391U (en18) | 1985-05-31 | 1985-05-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61198391U true JPS61198391U (en18) | 1986-12-11 |
Family
ID=30630964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8286385U Pending JPS61198391U (en18) | 1985-05-31 | 1985-05-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61198391U (en18) |
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1985
- 1985-05-31 JP JP8286385U patent/JPS61198391U/ja active Pending