JPH01180075U - - Google Patents
Info
- Publication number
- JPH01180075U JPH01180075U JP7760188U JP7760188U JPH01180075U JP H01180075 U JPH01180075 U JP H01180075U JP 7760188 U JP7760188 U JP 7760188U JP 7760188 U JP7760188 U JP 7760188U JP H01180075 U JPH01180075 U JP H01180075U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- negative pressure
- partition wall
- box
- safety
- 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
- 238000005192 partition Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims 1
Landscapes
- Safety Valves (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7760188U JPH01180075U (en]) | 1988-06-11 | 1988-06-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7760188U JPH01180075U (en]) | 1988-06-11 | 1988-06-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01180075U true JPH01180075U (en]) | 1989-12-25 |
Family
ID=31302578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7760188U Pending JPH01180075U (en]) | 1988-06-11 | 1988-06-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01180075U (en]) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5814560B2 (ja) * | 1976-06-28 | 1983-03-19 | モスコヴスキイ ゴルニイ インステイチユ−ト | 石炭層からのガスおよび／又は炭塵の流出を減少させる方法 |
-
1988
- 1988-06-11 JP JP7760188U patent/JPH01180075U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5814560B2 (ja) * | 1976-06-28 | 1983-03-19 | モスコヴスキイ ゴルニイ インステイチユ−ト | 石炭層からのガスおよび／又は炭塵の流出を減少させる方法 |