TREA

Sinking shafts

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Industry

  • CPC
  • E21D1/00
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS

Current Industry

E21D1/00Sinking shafts

Sub Industries

E21D1/02by hand E21D1/03mechanically E21D1/04with grabs E21D1/06with shaft-boring cutters E21D1/08while moving the lining downwards E21D1/10Preparation of the ground E21D1/105by water level modification E21D1/12by freezing E21D1/14Freezing apparatus E21D1/16by petrification
Industries