JPH03128794U - - Google Patents
Info
- Publication number
- JPH03128794U JPH03128794U JP3730190U JP3730190U JPH03128794U JP H03128794 U JPH03128794 U JP H03128794U JP 3730190 U JP3730190 U JP 3730190U JP 3730190 U JP3730190 U JP 3730190U JP H03128794 U JPH03128794 U JP H03128794U
- Authority
- JP
- Japan
- Prior art keywords
- starting shaft
- pipe
- small
- tip
- diameter
- 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
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000004576 sand 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 |
|---|---|---|---|
| JP3730190U JPH03128794U (enExample) | 1990-04-09 | 1990-04-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3730190U JPH03128794U (enExample) | 1990-04-09 | 1990-04-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03128794U true JPH03128794U (enExample) | 1991-12-25 |
Family
ID=31544286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3730190U Pending JPH03128794U (enExample) | 1990-04-09 | 1990-04-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03128794U (enExample) |
-
1990
- 1990-04-09 JP JP3730190U patent/JPH03128794U/ja active Pending
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