统一标准: unified standard细: thin; slender牙: tooth螺纹: screw thread; flight; helica ...统一标准超细牙螺纹: unified extra-fine thread统一标准特细牙螺纹: unef thread国家标准细牙螺纹: national fine thread; nf美国标准细牙螺纹: national fine统一标准粗牙螺纹: unc thread; unc unified national coarse thread; unified coarse thread英国准细牙螺纹: british standard fine thread英国细牙螺纹标准: british standard fine thread统一标准螺纹: unified screw thread; unified thread; unify thread; unity thread超细牙螺纹: extra fine thread特细牙螺纹: extra fine screw细牙螺纹: fine threads; fine-pitch thread统一标准螺纹规: unified screw thread gauge公制细牙螺纹: fine metric thread; metric fine thread; metric horse power美国细牙螺纹: american fine thread; nf american national fine thread美制细牙螺纹: national fine thread米制细牙螺纹: metric fine thread统一标准小直径螺纹: unified miniature screw thread统一标准小直径螺纹规: unified miniature screw thread gauge公制细牙螺纹板牙: die for english standard thread; die for metric fine thread公制细牙螺纹丝锥: tafor metric fine thread美国超细牙螺纹: american extra fine thread
