DIFF Subgroup
E21C 29/20 with safety devices operating in the event of breakage of the cable or chain
Introduced: September 1968
Full Title
Propulsion of machines for slitting or completely freeing the mineral from the seam > by cable or chains > with safety devices operating in the event of breakage of the cable or chain
No child classifications to compare. This is a leaf node in both IPC and CPC.