BE506916A - - Google Patents

Info

Publication number
BE506916A
BE506916A BE506916DA BE506916A BE 506916 A BE506916 A BE 506916A BE 506916D A BE506916D A BE 506916DA BE 506916 A BE506916 A BE 506916A
Authority
BE
Belgium
Prior art keywords
rolling
elements
hollow
intermediate elements
walls
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE506916A publication Critical patent/BE506916A/fr

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00Caps for supporting mine roofs
    • E21D17/01Caps for supporting mine roofs characterised by the shape of the cap, e.g. of specified cross-section

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)
  • Rod-Shaped Construction Members (AREA)
BE506916D BE506916A (enExample)

Publications (1)

Publication Number Publication Date
BE506916A true BE506916A (enExample)

Family

ID=147030

Family Applications (1)

Application Number Title Priority Date Filing Date
BE506916D BE506916A (enExample)

Country Status (1)

Country Link
BE (1) BE506916A (enExample)

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