JPH02109889U - - Google Patents
Info
- Publication number
- JPH02109889U JPH02109889U JP1688389U JP1688389U JPH02109889U JP H02109889 U JPH02109889 U JP H02109889U JP 1688389 U JP1688389 U JP 1688389U JP 1688389 U JP1688389 U JP 1688389U JP H02109889 U JPH02109889 U JP H02109889U
- Authority
- JP
- Japan
- Prior art keywords
- shield
- opening
- brake plate
- putting
- taking out
- 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
- 230000005641 tunneling Effects 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1688389U JPH02109889U (it) | 1989-02-17 | 1989-02-17 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1688389U JPH02109889U (it) | 1989-02-17 | 1989-02-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02109889U true JPH02109889U (it) | 1990-09-03 |
Family
ID=31230199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1688389U Pending JPH02109889U (it) | 1989-02-17 | 1989-02-17 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02109889U (it) |
-
1989
- 1989-02-17 JP JP1688389U patent/JPH02109889U/ja active Pending