短語詞組短語elbow bend pipe 肘形彎管;彎頭;彎管elbow -pipe flowmeter 彎管流量計elbow sounding pipe 肘式測深管elbow w pipe 彎管flange and elbow bend pipe 法蘭盤彎管ge and elbow bend pipe 法蘭盤彎管right angle elbow pipe 直角彎管 返回 elbow pipe