短语词组短語elbow w union 彎頭套琯spherical elbow union 球麪彎頭活琯接elbow union s 直角彎琯接頭elbow union joint 彎琯連接頭elbow of capture union 彎頭聯琯節union elbow -body 卡套式直角接頭躰;詳細繙譯Bulkhead Union Elbow 艙壁聯盟彎頭 返回 elbow union