标 准 编 号：DIN 2615-1-1992 简体中文标题：对焊钢制管件.带有换算压力系数的丁字管接 繁体中文标题：对焊钢制管件.带有换算压力系数的丁字管接English Name：Steel butt-welding pipes fittings; tees with reduced pressure factor ...