BE523225A - - Google Patents
Info
- Publication number
- BE523225A BE523225A BE523225DA BE523225A BE 523225 A BE523225 A BE 523225A BE 523225D A BE523225D A BE 523225DA BE 523225 A BE523225 A BE 523225A
- Authority
- BE
- Belgium
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/08—Cap joints for obtaining a coal-face free of pit-props
- E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Joining Of Building Structures In Genera (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2471952A GB744361A (en) | 1952-10-02 | 1952-10-02 | Improvements in mine roof supports |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE523225A true BE523225A (zh) |
Family
ID=10216165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE523225D BE523225A (zh) | 1952-10-02 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE523225A (zh) |
| FR (1) | FR1084556A (zh) |
| GB (1) | GB744361A (zh) |
-
0
- BE BE523225D patent/BE523225A/xx unknown
-
1952
- 1952-10-02 GB GB2471952A patent/GB744361A/en not_active Expired
-
1953
- 1953-10-02 FR FR1084556D patent/FR1084556A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1084556A (fr) | 1955-01-20 |
| GB744361A (en) | 1956-02-08 |