FR1050049A - - Google Patents
Info
- Publication number
- FR1050049A FR1050049A FR1050049DA FR1050049A FR 1050049 A FR1050049 A FR 1050049A FR 1050049D A FR1050049D A FR 1050049DA FR 1050049 A FR1050049 A FR 1050049A
- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR1050049A true FR1050049A (en) | 1954-01-05 |
Family
ID=1567576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR1050049D Expired FR1050049A (en) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR1050049A (en) |
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0
- FR FR1050049D patent/FR1050049A/fr not_active Expired