BE509661A - - Google Patents

Info

Publication number
BE509661A
BE509661A BE509661DA BE509661A BE 509661 A BE509661 A BE 509661A BE 509661D A BE509661D A BE 509661DA BE 509661 A BE509661 A BE 509661A
Authority
BE
Belgium
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of BE509661A publication Critical patent/BE509661A/xx

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
    • E21D17/08Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086Cap joints for obtaining a coal-face free of pit-props or articulated type

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)
  • Bridges Or Land Bridges (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
BE509661D 1951-03-07 BE509661A (en:Method)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL709240X 1951-03-07
NL760654X 1953-10-29

Publications (1)

Publication Number Publication Date
BE509661A true BE509661A (en:Method)

Family

ID=31980708

Family Applications (3)

Application Number Title Priority Date Filing Date
BE532795D BE532795A (en:Method) 1951-03-07
BE509662D BE509662A (en:Method) 1951-03-07
BE509661D BE509661A (en:Method) 1951-03-07

Family Applications Before (2)

Application Number Title Priority Date Filing Date
BE532795D BE532795A (en:Method) 1951-03-07
BE509662D BE509662A (en:Method) 1951-03-07

Country Status (4)

Country Link
BE (3) BE509661A (en:Method)
FR (3) FR1051786A (en:Method)
GB (3) GB709240A (en:Method)
NL (4) NL89595C (en:Method)

Also Published As

Publication number Publication date
BE532795A (en:Method)
FR1051869A (fr) 1954-01-19
FR1051786A (fr) 1954-01-19
GB709240A (en) 1954-05-19
NL159680B (nl)
NL182433B (nl)
NL159679A (en:Method)
GB709241A (en) 1954-05-19
GB760654A (en) 1956-11-07
NL89595C (en:Method)
FR67282E (fr)
BE509662A (en:Method)

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