TREA

Devices preventing sparking of machines or apparatus

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Industry

  • CPC
  • E21F9/00
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS

Current Industry

E21F9/00Devices preventing sparking of machines or apparatus
Industries