FR954907A - - Google Patents
Info
- Publication number
- FR954907A FR954907A FR954907DA FR954907A FR 954907 A FR954907 A FR 954907A FR 954907D A FR954907D A FR 954907DA FR 954907 A FR954907 A FR 954907A
- 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
- E21D17/01—Caps for supporting mine roofs characterised by the shape of the cap, e.g. of specified cross-section
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 |
|---|---|
| FR954907A true FR954907A (nl) | 1950-01-06 |
Family
ID=1557734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR954907D Expired FR954907A (nl) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR954907A (nl) |
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0
- FR FR954907D patent/FR954907A/fr not_active Expired