135835 ⎘
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 Winches or other means for pulling cable or chain
Winch drum tension isolation system
#2Method for the mining of coal and coal planer installation
#3Apparatus and method for installing lines in conduits
#4Driving device for sprocket wheels of chain drives