JPS6141834Y2 - - Google Patents
Info
- Publication number
- JPS6141834Y2 JPS6141834Y2 JP18201981U JP18201981U JPS6141834Y2 JP S6141834 Y2 JPS6141834 Y2 JP S6141834Y2 JP 18201981 U JP18201981 U JP 18201981U JP 18201981 U JP18201981 U JP 18201981U JP S6141834 Y2 JPS6141834 Y2 JP S6141834Y2
- Authority
- JP
- Japan
- Prior art keywords
- rod
- bit
- groove
- protrusion
- hole
- 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
- 238000005553 drilling Methods 0.000 claims description 39
- 239000011435 rock Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18201981U JPS5885696U (ja) | 1981-12-07 | 1981-12-07 | さく岩機のさく孔装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18201981U JPS5885696U (ja) | 1981-12-07 | 1981-12-07 | さく岩機のさく孔装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5885696U JPS5885696U (ja) | 1983-06-10 |
| JPS6141834Y2 true JPS6141834Y2 (en]) | 1986-11-27 |
Family
ID=29980010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18201981U Granted JPS5885696U (ja) | 1981-12-07 | 1981-12-07 | さく岩機のさく孔装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5885696U (en]) |
-
1981
- 1981-12-07 JP JP18201981U patent/JPS5885696U/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5885696U (ja) | 1983-06-10 |
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