JPH02129489U - - Google Patents
Info
- Publication number
- JPH02129489U JPH02129489U JP3806189U JP3806189U JPH02129489U JP H02129489 U JPH02129489 U JP H02129489U JP 3806189 U JP3806189 U JP 3806189U JP 3806189 U JP3806189 U JP 3806189U JP H02129489 U JPH02129489 U JP H02129489U
- Authority
- JP
- Japan
- Prior art keywords
- section
- receiving
- detection device
- object detection
- receiving section
- 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
- 238000010586 diagram Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3806189U JPH02129489U (en]) | 1989-03-31 | 1989-03-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3806189U JPH02129489U (en]) | 1989-03-31 | 1989-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02129489U true JPH02129489U (en]) | 1990-10-25 |
Family
ID=31545728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3806189U Pending JPH02129489U (en]) | 1989-03-31 | 1989-03-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02129489U (en]) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4842402A (en]) * | 1971-10-05 | 1973-06-20 | ||
| JPS6468613A (en) * | 1987-09-09 | 1989-03-14 | Kajima Corp | Position detecting method for underground drilling machine |
-
1989
- 1989-03-31 JP JP3806189U patent/JPH02129489U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4842402A (en]) * | 1971-10-05 | 1973-06-20 | ||
| JPS6468613A (en) * | 1987-09-09 | 1989-03-14 | Kajima Corp | Position detecting method for underground drilling machine |