TREA

with axial screw-and-nut, rack-and-worm, or like mechanism

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Industry

  • CPC
  • E21D15/24
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D15/00Props Chocks

Current Industry

E21D15/24with axial screw-and-nut, rack-and-worm, or like mechanism
Industries