... 盾盖式开采法 shield mining method; shielding method 房柱式开采法 board and pillar method; board and wall method; bord and pillar method; bord and wall method; chamber and pillar; heading and stall method; heading and stall system; heading-and-stall method; room-and-pillar working; stall and breast method; stallandbreastmethod; stoop and room system 后退式开采法 mining retreating; miningretreating; retreating system ...
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