短语词组短語single bevel groove weld 單斜槽銲;單斜角槽銲single J groove weld 丁槽熔接single -flare-Vee groove weld 單麪半喇叭形坡口銲縫single flare Vee groove weld 單麪喇叭形V型坡口銲縫single V -groove weld V形槽熔接 返回 single groove weld