TREA

by means on the machine exerting a thrust against fixed supports

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Industry

  • CPC
  • E21C29/02
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING E21C29/00Propulsion of machines for slitting or completely freeing the mineral from the seam

Current Industry

E21C29/02by means on the machine exerting a thrust against fixed supports
Industries