articulation union swivel union活接头
union swivel活接头;旋转联管节;管套活转节
union swivel end转环联结端;转环连接端;[机] 联管节旋转端;联管节旋转端
spherical union swivel球面活管接旋转接头
Dart Union Swivel接头
interior plug union swivel内丝活接
exterior plug union swivel外丝活接
air union swivel气管旋转联管节;气管旋转接头
spheric union swivel球面活管接旋转接头