BE469913A - - Google Patents

Info

Publication number
BE469913A
BE469913A BE469913DA BE469913A BE 469913 A BE469913 A BE 469913A BE 469913D A BE469913D A BE 469913DA BE 469913 A BE469913 A BE 469913A
Authority
BE
Belgium
Prior art keywords
mobile
adjustable
hand
inclined plane
effect
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE469913A publication Critical patent/BE469913A/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
    • E21D15/34Telescopic props with parts held relatively to each other by friction or gripping by axially- moving balls, rollers, or the like

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)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Casings For Electric Apparatus (AREA)
BE469913D BE469913A (enExample)

Publications (1)

Publication Number Publication Date
BE469913A true BE469913A (enExample)

Family

ID=120226

Family Applications (1)

Application Number Title Priority Date Filing Date
BE469913D BE469913A (enExample)

Country Status (1)

Country Link
BE (1) BE469913A (enExample)

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