JPS6418686U - - Google Patents
Info
- Publication number
- JPS6418686U JPS6418686U JP11319787U JP11319787U JPS6418686U JP S6418686 U JPS6418686 U JP S6418686U JP 11319787 U JP11319787 U JP 11319787U JP 11319787 U JP11319787 U JP 11319787U JP S6418686 U JPS6418686 U JP S6418686U
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- new
- old
- excavator
- pipes
- 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
- 230000007423 decrease Effects 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 238000007796 conventional method Methods 0.000 description 2
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11319787U JPS6418686U (enExample) | 1987-07-23 | 1987-07-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11319787U JPS6418686U (enExample) | 1987-07-23 | 1987-07-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6418686U true JPS6418686U (enExample) | 1989-01-30 |
Family
ID=31352819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11319787U Pending JPS6418686U (enExample) | 1987-07-23 | 1987-07-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6418686U (enExample) |
-
1987
- 1987-07-23 JP JP11319787U patent/JPS6418686U/ja active Pending
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