BE629617A - - Google Patents

Info

Publication number
BE629617A
BE629617A BE629617DA BE629617A BE 629617 A BE629617 A BE 629617A BE 629617D A BE629617D A BE 629617DA BE 629617 A BE629617 A BE 629617A
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 BE629617A publication Critical patent/BE629617A/xx
Priority to FR927191A priority Critical patent/FR1349804A/fr

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH 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
BE629617D 1963-03-07 BE629617A (xx)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR927191A FR1349804A (fr) 1963-03-07 1963-03-07 Assemblage de chapeaux pour jambes de force dans les exploitations minières

Publications (1)

Publication Number Publication Date
BE629617A true BE629617A (xx)

Family

ID=8798699

Family Applications (1)

Application Number Title Priority Date Filing Date
BE629617D BE629617A (xx) 1963-03-07

Country Status (2)

Country Link
BE (1) BE629617A (xx)
FR (1) FR1349804A (xx)

Also Published As

Publication number Publication date
FR1349804A (fr) 1964-01-17

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