root of joint

船舶英语手册 - 豆丁网 ... 焊合线 Bond line 接头根部 Root of joint 焊接区 Weld zone ...

焊接词典(1)_笑对人生_新浪博客 ... 1401 焊接接头 welded joint 1402 接合根部 root of joint 1403 对接接头 butt joint ...

直角三角形_馆档网 ... "齿根线"," root line" "接合根(熔接)"," root of joint" "螺纹根"," root of thread" ...