装配接头 meaning in English

erection joint
fitting joint

Aerospace fitting joint assembly , radial sealing . male thread fittings . iso metric thread profile and tolerances . dimensions
航空航天径向密封装配接头组件.阳螺纹接头. iso米制螺纹牙形和公差.尺寸
Aerospace fitting joint assembly , radial sealing . internal thread bosses . iso metric thread profile and tolerances . dimensions
航空航天径向密封装配接头组件.内螺纹套管. iso米制螺纹牙形和公差.尺寸