BE472217A - - Google Patents

Info

Publication number
BE472217A
BE472217A BE472217DA BE472217A BE 472217 A BE472217 A BE 472217A BE 472217D A BE472217D A BE 472217DA BE 472217 A BE472217 A BE 472217A
Authority
BE
Belgium
Prior art keywords
extensions
support according
spacers
extension
spacer
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE472217A publication Critical patent/BE472217A/fr

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00Caps for supporting mine roofs
    • E21D17/02Cantilever extension or similar protecting devices
    • E21D17/0213Assembling devices for pivoting caps upwardly

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Tents Or Canopies (AREA)
BE472217D BE472217A (enrdf_load_html_response)

Publications (1)

Publication Number Publication Date
BE472217A true BE472217A (enrdf_load_html_response)

Family

ID=121850

Family Applications (1)

Application Number Title Priority Date Filing Date
BE472217D BE472217A (enrdf_load_html_response)

Country Status (1)

Country Link
BE (1) BE472217A (enrdf_load_html_response)

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