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
E21C29/14—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains by haulage cable or chain pulling the machine along the working face
E21C29/16—Winches or other means for pulling cable or chain
Installation de rabotage pour les exploitations houilleres au fond, avec un dispositif de havage dans la zone de transition de la taille a la galerie, plus particulierement pour une galerie en couche