JPS6235749Y2 - - Google Patents
Info
- Publication number
- JPS6235749Y2 JPS6235749Y2 JP8337281U JP8337281U JPS6235749Y2 JP S6235749 Y2 JPS6235749 Y2 JP S6235749Y2 JP 8337281 U JP8337281 U JP 8337281U JP 8337281 U JP8337281 U JP 8337281U JP S6235749 Y2 JPS6235749 Y2 JP S6235749Y2
- Authority
- JP
- Japan
- Prior art keywords
- rod tube
- holder
- rod
- cylinder
- boom
- 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 7
- 238000009412 basement excavation Methods 0.000 description 13
- 239000004576 sand Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8337281U JPS6235749Y2 (en, 2012) | 1981-06-05 | 1981-06-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8337281U JPS6235749Y2 (en, 2012) | 1981-06-05 | 1981-06-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57197586U JPS57197586U (en, 2012) | 1982-12-15 |
| JPS6235749Y2 true JPS6235749Y2 (en, 2012) | 1987-09-10 |
Family
ID=29878810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8337281U Expired JPS6235749Y2 (en, 2012) | 1981-06-05 | 1981-06-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6235749Y2 (en, 2012) |
-
1981
- 1981-06-05 JP JP8337281U patent/JPS6235749Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57197586U (en, 2012) | 1982-12-15 |
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