CPC Subgroup
E21C 31/02 for cutting or breaking-down devices
Full Title
Driving means incorporated in machines for slitting or completely freeing the mineral from the seam > for cutting or breaking-down devices
3 direct subcodes
Child Classifications
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- E21C 31/04 imparting both a rotary and reciprocating motion
- E21C 31/06 actuated by an endless cable or chain