FR87064E - Improvements to hydraulic props for mines - Google Patents
Improvements to hydraulic props for minesInfo
- Publication number
- FR87064E FR87064E FR993822A FR993822A FR87064E FR 87064 E FR87064 E FR 87064E FR 993822 A FR993822 A FR 993822A FR 993822 A FR993822 A FR 993822A FR 87064 E FR87064 E FR 87064E
- Authority
- FR
- France
- Prior art keywords
- mines
- hydraulic props
- props
- hydraulic
- Prior art date
- 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
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
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)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR993822A FR87064E (en) | 1964-11-04 | 1964-11-04 | Improvements to hydraulic props for mines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR993822A FR87064E (en) | 1964-11-04 | 1964-11-04 | Improvements to hydraulic props for mines |
Publications (1)
Publication Number | Publication Date |
---|---|
FR87064E true FR87064E (en) | 1966-06-03 |
Family
ID=8841777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR993822A Expired FR87064E (en) | 1964-11-04 | 1964-11-04 | Improvements to hydraulic props for mines |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR87064E (en) |
-
1964
- 1964-11-04 FR FR993822A patent/FR87064E/en not_active Expired
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