TREA

and supported by two or more rows of struts parallel to the working face

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Industry

  • CPC
  • E21D23/0043
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D23/00Mine roof supports for step- by- step movement

Current Industry

E21D23/0043and supported by two or more rows of struts parallel to the working face
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