BE628955A - - Google Patents
Info
- Publication number
- BE628955A BE628955A BE628955DA BE628955A BE 628955 A BE628955 A BE 628955A BE 628955D A BE628955D A BE 628955DA BE 628955 A BE628955 A BE 628955A
- Authority
- BE
- Belgium
- Prior art keywords
- prop
- tube
- sheath
- yielding
- jack
- Prior art date
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)
- Actuator (AREA)
Publications (1)
Publication Number | Publication Date |
---|---|
BE628955A true BE628955A (OSRAM) |
Family
ID=198631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE628955D BE628955A (OSRAM) |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE628955A (OSRAM) |
-
0
- BE BE628955D patent/BE628955A/fr unknown
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