短語詞組短語mine s ventilation 礦井通風mine reverse ventilation 礦井反風mine natural ventilation 礦井自然通風mine pressure ventilation system 礦井壓風系統(tǒng)mine s ventilation system 礦井通風系統(tǒng)mine shaft ventilation 礦井通風Mine Local Ventilation Facilities System 礦井局部通風設(shè)備系統(tǒng)Mine Ventilation Parameter Detector 礦井通風參數(shù)檢測儀coal mine ventilation motor 煤礦通風機 返回 mine ventilation