短语词组短語bucket t trencher 鬭式挖溝機bucket wheel trencher [機]鬭輪式挖溝機chain bucket trencher [機]鏈鬭式挖溝機;鏈鬭式挖溝機multi -bucket trencher 多鬭式挖溝機endless -bucket trencher 輪式挖溝機disk and bucket trencher 輪鬭式開溝機 返回 bucket trencher