接头数英文

外丝接头Nipple,内丝接头Thread Coupling,内丝活接头和外丝活接头都是Union，只是在说的时候说明一下外螺纹Male Thread和内螺纹Female Thread。这些产品都是有这些专业名词的翻译，不能直译。

对接头对接头 [词典] butt joint; [例句]通过试验研究了力学不均匀性对接头断裂韧性和裂纹开裂角的影响。Effects of mechanical heterogeneity on fracture toughness and crack deviation angle of the joints were investigated by experiment.