135863 ⎘
Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam not provided for in groups - , or; Guiding the machine along a conveyor for the cut mineral Means for inclining the conveyor
Method of setting an automatic level control of the plow in plowing operations of coal mining
#2Method and apparatus for maintaining longwall face alignment
#3Connection device
#4Trough pan for a face conveyor with a loading ramp