TREA

Use of fluid-tight or anti-friction material on outside of, or between, lining layers

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Industry

  • CPC
  • E21D5/012
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D5/00Lining shafts Linings therefor

Current Industry

E21D5/012Use of fluid-tight or anti-friction material on outside of, or between, lining layers
Industries