JPH0461189U - - Google Patents
Info
- Publication number
- JPH0461189U JPH0461189U JP10094890U JP10094890U JPH0461189U JP H0461189 U JPH0461189 U JP H0461189U JP 10094890 U JP10094890 U JP 10094890U JP 10094890 U JP10094890 U JP 10094890U JP H0461189 U JPH0461189 U JP H0461189U
- Authority
- JP
- Japan
- Prior art keywords
- outer tube
- inner tube
- tube
- reaction ring
- excavation
- 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.)
- Granted
Links
- 238000005553 drilling Methods 0.000 claims description 2
- 238000009412 basement excavation Methods 0.000 claims 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000003756 stirring Methods 0.000 description 2
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10094890U JP2538925Y2 (ja) | 1990-09-28 | 1990-09-28 | 掘削ロッドの掘削方向修正装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10094890U JP2538925Y2 (ja) | 1990-09-28 | 1990-09-28 | 掘削ロッドの掘削方向修正装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0461189U true JPH0461189U (en]) | 1992-05-26 |
| JP2538925Y2 JP2538925Y2 (ja) | 1997-06-18 |
Family
ID=31843994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10094890U Expired - Fee Related JP2538925Y2 (ja) | 1990-09-28 | 1990-09-28 | 掘削ロッドの掘削方向修正装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2538925Y2 (en]) |
-
1990
- 1990-09-28 JP JP10094890U patent/JP2538925Y2/ja not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2538925Y2 (ja) | 1997-06-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |