DIN EN 10226-2:2005 螺纹上有压力密封接缝的管螺纹.第2部分:锥形外螺纹和锥形内螺纹.尺寸、公差和名称与符号
Pipe threads where pressure tight joints are made on the threads - Part 2: Taper external threads and taper internal threads - Dimensions, tolerances and designation;English version of DIN EN 10226-2