FR954897A - - Google Patents
Info
- Publication number
- FR954897A FR954897A FR954897DA FR954897A FR 954897 A FR954897 A FR 954897A FR 954897D A FR954897D A FR 954897DA FR 954897 A FR954897 A FR 954897A
- Authority
- FR
- France
- 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
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
- E21D17/0213—Assembling devices for pivoting caps upwardly
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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR954897A true FR954897A (zh) | 1950-01-06 |
Family
ID=1557725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR954897D Expired FR954897A (zh) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR954897A (zh) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3115754A (en) * | 1959-01-23 | 1963-12-31 | Dowty Mining Equipment Ltd | Mining shield |
-
0
- FR FR954897D patent/FR954897A/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3115754A (en) * | 1959-01-23 | 1963-12-31 | Dowty Mining Equipment Ltd | Mining shield |