美: beautiful; pretty过: cross; pass标准: standard; criterion; benchma ...管螺纹: gas thread; pipe thread国家标准管螺纹: npt美国标准管螺纹: american standard pipe thread英国标准管螺纹: bspt =british standard pipe thread; t =british standard pipe thread英国标准管螺纹英国的: british standard pipe thread英国标准管用螺纹: british standard pipe thread美国标准直管螺纹: nps american standard straight pipe thread美国标准锥管螺纹: npt american standard taper pipe thread英国管螺纹标准: british standard pipe thread; bsp管螺纹, 气管螺纹: gas thread标准管: standard pipe; standard tube; tube， standard美国标准协会管螺纹: american standard association pipe threads; asa pipe threads超过标准: be above standard; exceed the permitted limit超过标准的: excess; over proof=overproof; overproof超过标准球,: over par管螺纹 三角螺纹: v-thread干封管螺纹: dry seal pipe thread管螺纹板牙: die for pipe thread; pipe thread die管螺纹车床: pipe threading machine管螺纹钢板: screw plate for gas thread管螺纹环: pipe thread ring管螺纹机: pipe screw cutting machine (or pipe threading machine); pipe thread cutting machine; pipethreadingmachine
