DIN EN 60534-2-1:2012 工业.处理控制阀.第2-1部分:流量.安装条件下流体流动上浆处理方程(IEC 60534-2-1-2011).德文版 EN 60534-2-1-2011
Industrial-process control valves - Part 2-1: Flow capacity - Sizing equations for fluid flow under installed conditions (IEC 60534-2-1:2011); German version EN 60534-2-1:2011