FR1271561A - - Google Patents
Info
- Publication number
- FR1271561A FR1271561A FR1271561DA FR1271561A FR 1271561 A FR1271561 A FR 1271561A FR 1271561D A FR1271561D A FR 1271561DA FR 1271561 A FR1271561 A FR 1271561A
- 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
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/10—Air doors
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 |
|---|---|
| FR1271561A true FR1271561A (cs) | 1962-01-19 |
Family
ID=1570455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR1271561D Expired FR1271561A (cs) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR1271561A (cs) |
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0
- FR FR1271561D patent/FR1271561A/fr not_active Expired