TREA

directly by air, steam, or gas pressure

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Industry

  • CPC
  • E21C3/24
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING E21C3/00Drilling machines with reciprocating tool that is intermittently turned when out of contact with the working face

Current Industry

E21C3/24directly by air, steam, or gas pressure
Industries