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with coupling or uncoupling of the machine at will
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Industry
CPC
E21C29/185
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Parent Industries
E
FIXED CONSTRUCTIONS
E21
Mining
E21C
MINING OR QUARRYING
E21C29/00
Propulsion of machines for slitting or completely freeing the mineral from the seam
Current Industry
E21C29/185
with coupling or uncoupling of the machine at will
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last 30 patents
CPC
E21C29/185
