短语词组短語cutterhead pipe line dredge 鉸吸式挖泥船hydraulic pipe line dredge 吸泥式挖掘船;吸敭式挖泥船hydraulic c pipe line dredge 吸泥式挖掘船hydraulic permeability pipe line dredge 水力排琯式挖掘船 返回 dredge pipe line