TREA

the advancing mechanisms being separate from the supporting construction

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Industry

  • CPC
  • E21D23/24
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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

E21D23/24the advancing mechanisms being separate from the supporting construction
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