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
Application number
Other languages
English (en)
French (fr)
Publication of BE628955A publication Critical patent/BE628955A/fr

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14Telescopic props
    • E21D15/44Hydraulic, 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)
BE628955D BE628955A (enrdf_load_html_response)

Publications (1)

Publication Number Publication Date
BE628955A true BE628955A (enrdf_load_html_response)

Family

ID=198631

Family Applications (1)

Application Number Title Priority Date Filing Date
BE628955D BE628955A (enrdf_load_html_response)

Country Status (1)

Country Link
BE (1) BE628955A (enrdf_load_html_response)

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