TREA

having longitudinal cavities communicating with the exterior on the outer side of the lining elements

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Industry

  • CPC
  • E21D11/388
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D11/00Lining tunnels, galleries or other underground cavities

Current Industry

E21D11/388having longitudinal cavities communicating with the exterior on the outer side of the lining elements
Industries