Patent classifications
E
FIXED CONSTRUCTIONS
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E21
EARTH OR ROCK DRILLING; MINING
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E21C
MINING OR QUARRYING
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25/00
Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
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E21C25/68
Machines for making slits combined with equipment for removing, e.g. by loading, material won by other means
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