JPH02116593U - - Google Patents
Info
- Publication number
- JPH02116593U JPH02116593U JP2387289U JP2387289U JPH02116593U JP H02116593 U JPH02116593 U JP H02116593U JP 2387289 U JP2387289 U JP 2387289U JP 2387289 U JP2387289 U JP 2387289U JP H02116593 U JPH02116593 U JP H02116593U
- Authority
- JP
- Japan
- Prior art keywords
- tip
- propulsion
- magnetic field
- drilling
- tube
- 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
- 238000001514 detection method Methods 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 239000002689 soil Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2387289U JPH02116593U (cs) | 1989-03-03 | 1989-03-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2387289U JPH02116593U (cs) | 1989-03-03 | 1989-03-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02116593U true JPH02116593U (cs) | 1990-09-18 |
Family
ID=31243234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2387289U Pending JPH02116593U (cs) | 1989-03-03 | 1989-03-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02116593U (cs) |
-
1989
- 1989-03-03 JP JP2387289U patent/JPH02116593U/ja active Pending
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