JPH01105695U - - Google Patents
Info
- Publication number
- JPH01105695U JPH01105695U JP150288U JP150288U JPH01105695U JP H01105695 U JPH01105695 U JP H01105695U JP 150288 U JP150288 U JP 150288U JP 150288 U JP150288 U JP 150288U JP H01105695 U JPH01105695 U JP H01105695U
- Authority
- JP
- Japan
- Prior art keywords
- shield
- spherical convex
- circumferential direction
- convex portion
- front body
- 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
- 238000005452 bending Methods 0.000 claims 1
- 230000005641 tunneling Effects 0.000 description 3
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP150288U JPH01105695U (en]) | 1988-01-08 | 1988-01-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP150288U JPH01105695U (en]) | 1988-01-08 | 1988-01-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01105695U true JPH01105695U (en]) | 1989-07-17 |
Family
ID=31201442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP150288U Pending JPH01105695U (en]) | 1988-01-08 | 1988-01-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01105695U (en]) |
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1988
- 1988-01-08 JP JP150288U patent/JPH01105695U/ja active Pending