FR958217A - - Google Patents
Info
- Publication number
- FR958217A FR958217A FR958217DA FR958217A FR 958217 A FR958217 A FR 958217A FR 958217D A FR958217D A FR 958217DA FR 958217 A FR958217 A FR 958217A
- 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
- E21D17/08—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)
- Bridges Or Land Bridges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR661674X | 1947-11-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR958217A true FR958217A (sv) | 1950-03-06 |
Family
ID=9011035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR958217D Expired FR958217A (sv) | 1947-11-17 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR958217A (sv) |
| GB (1) | GB661674A (sv) |
-
0
- FR FR958217D patent/FR958217A/fr not_active Expired
-
1948
- 1948-10-25 GB GB27671/48A patent/GB661674A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB661674A (en) | 1951-11-28 |