JPS61181383U - - Google Patents
Info
- Publication number
- JPS61181383U JPS61181383U JP6518685U JP6518685U JPS61181383U JP S61181383 U JPS61181383 U JP S61181383U JP 6518685 U JP6518685 U JP 6518685U JP 6518685 U JP6518685 U JP 6518685U JP S61181383 U JPS61181383 U JP S61181383U
- Authority
- JP
- Japan
- Prior art keywords
- side hole
- reference signal
- phase difference
- detecting
- ground surface
- 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 1
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003550 marker Substances 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6518685U JPS61181383U (es) | 1985-05-02 | 1985-05-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6518685U JPS61181383U (es) | 1985-05-02 | 1985-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61181383U true JPS61181383U (es) | 1986-11-12 |
Family
ID=30596958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6518685U Pending JPS61181383U (es) | 1985-05-02 | 1985-05-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61181383U (es) |
-
1985
- 1985-05-02 JP JP6518685U patent/JPS61181383U/ja active Pending
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