短語詞組短語MYERS Submersible Sewage Pump 美國美亞潛水式污水泵submersible sewage pump impeller 潛污泵葉輪centrifugal submersible sewage pump 離心式潛污泵sewage ejector submersible pump 噴射式潛入污水泵 返回 submersible sewage pump