BE510777A - - Google Patents

Info

Publication number
BE510777A
BE510777A BE510777DA BE510777A BE 510777 A BE510777 A BE 510777A BE 510777D A BE510777D A BE 510777DA BE 510777 A BE510777 A BE 510777A
Authority
BE
Belgium
Prior art keywords
blades
barrel
parts
lock
blade
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE510777A publication Critical patent/BE510777A/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
    • E21D15/28Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/38Telescopic props with parts held relatively to each other by friction or gripping with longitudinally-divided upper or lower prop parts, e.g. interfitting laminations

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)
  • Braking Arrangements (AREA)
BE510777D BE510777A (en:Method)

Publications (1)

Publication Number Publication Date
BE510777A true BE510777A (en:Method)

Family

ID=149765

Family Applications (1)

Application Number Title Priority Date Filing Date
BE510777D BE510777A (en:Method)

Country Status (1)

Country Link
BE (1) BE510777A (en:Method)

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