JPH01137395U - - Google Patents
Info
- Publication number
- JPH01137395U JPH01137395U JP3289088U JP3289088U JPH01137395U JP H01137395 U JPH01137395 U JP H01137395U JP 3289088 U JP3289088 U JP 3289088U JP 3289088 U JP3289088 U JP 3289088U JP H01137395 U JPH01137395 U JP H01137395U
- Authority
- JP
- Japan
- Prior art keywords
- ring
- steel pipe
- soft duct
- thrust
- steel
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000003139 buffering effect Effects 0.000 claims description 4
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988032890U JPH07546Y2 (ja) | 1988-03-12 | 1988-03-12 | 推力緩衝用当輪 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988032890U JPH07546Y2 (ja) | 1988-03-12 | 1988-03-12 | 推力緩衝用当輪 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01137395U true JPH01137395U (enrdf_load_stackoverflow) | 1989-09-20 |
| JPH07546Y2 JPH07546Y2 (ja) | 1995-01-11 |
Family
ID=31259488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988032890U Expired - Lifetime JPH07546Y2 (ja) | 1988-03-12 | 1988-03-12 | 推力緩衝用当輪 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07546Y2 (enrdf_load_stackoverflow) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5438610A (en) * | 1977-09-01 | 1979-03-23 | Kido Kensetsu Kogyo | Method of propelling and burying small aperture soft duct |
| JPS54144708A (en) * | 1978-04-30 | 1979-11-12 | Katsuma Kazunari | Crack forming preventive device in case when laying hume pipe |
| JPS6026885A (ja) * | 1983-07-25 | 1985-02-09 | 電気化学工業株式会社 | コンクリ−ト推進管用クッション材 |
-
1988
- 1988-03-12 JP JP1988032890U patent/JPH07546Y2/ja not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5438610A (en) * | 1977-09-01 | 1979-03-23 | Kido Kensetsu Kogyo | Method of propelling and burying small aperture soft duct |
| JPS54144708A (en) * | 1978-04-30 | 1979-11-12 | Katsuma Kazunari | Crack forming preventive device in case when laying hume pipe |
| JPS6026885A (ja) * | 1983-07-25 | 1985-02-09 | 電気化学工業株式会社 | コンクリ−ト推進管用クッション材 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07546Y2 (ja) | 1995-01-11 |