FR955673A - - Google Patents
Info
- Publication number
- FR955673A FR955673A FR955673DA FR955673A FR 955673 A FR955673 A FR 955673A FR 955673D A FR955673D A FR 955673DA FR 955673 A FR955673 A FR 955673A
- 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
- 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
- E21D15/32—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR955673A true FR955673A (zh) | 1950-01-18 |
Family
ID=1558368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR955673D Expired FR955673A (zh) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR955673A (zh) |
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0
- FR FR955673D patent/FR955673A/fr not_active Expired