Description
Class E21C : MINING OR QUARRYING
Subclass 25/50: Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (dislodging machines with slitting means E21C 27/02, E21C 27/1, E21C 27/18) Machines slitting solely by one or more cutter chains moving unidirectionally along jibs with equipment for cleaning the slit (associated with rotary-rod or rotary-drum machines E21C 25/14)