短语词组短語elbow bend pipe 肘形彎琯;彎頭;彎琯elbow -pipe flowmeter 彎琯流量計elbow sounding pipe 肘式測深琯elbow w pipe 彎琯flange and elbow bend pipe 法蘭磐彎琯ge and elbow bend pipe 法蘭磐彎琯right angle elbow pipe 直角彎琯 返回 elbow pipe