JPS557498B2 - - Google Patents
Info
- Publication number
- JPS557498B2 JPS557498B2 JP14899375A JP14899375A JPS557498B2 JP S557498 B2 JPS557498 B2 JP S557498B2 JP 14899375 A JP14899375 A JP 14899375A JP 14899375 A JP14899375 A JP 14899375A JP S557498 B2 JPS557498 B2 JP S557498B2
- Authority
- JP
- Japan
- 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.)
- Expired
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14899375A JPS5273506A (en) | 1975-12-13 | 1975-12-13 | Airtightness retaining apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14899375A JPS5273506A (en) | 1975-12-13 | 1975-12-13 | Airtightness retaining apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5273506A JPS5273506A (en) | 1977-06-20 |
| JPS557498B2 true JPS557498B2 (fi) | 1980-02-26 |
Family
ID=15465290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14899375A Granted JPS5273506A (en) | 1975-12-13 | 1975-12-13 | Airtightness retaining apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5273506A (fi) |
-
1975
- 1975-12-13 JP JP14899375A patent/JPS5273506A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5273506A (en) | 1977-06-20 |