螺纹缩写，NPTF，NPSM，JIC，NFPA，BSP，BSPT，BSPP Abbreviations 螺纹缩写NPTFNational Pipe Tapered Fuel美制干密封圆锥管螺纹NPSMNational Pipe Straight Mechanical美国标准机械接头直管螺纹ISOInternational Standards Organizatio...
