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E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
E21C29/04—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains
E21C29/06—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains anchored at one or both ends to the mine working face
E21C29/10—Cable or chain co-operating with a winch or the like on the machine
Entrainement auxiliaire de direction,dispositif de deplacement d'arbre pour cet entrainement de direction et procede de montage d'un tel entrainement