短语词组短语cutterhead pipe line dredge 铰吸式挖泥船hydraulic pipe line dredge 吸泥式挖掘船;吸扬式挖泥船hydraulic c pipe line dredge 吸泥式挖掘船hydraulic permeability pipe line dredge 水力排管式挖掘船 返回 dredge pipe line