Industrial-process control valves - Part 2-1: Flow capacity - Sizing equations for fluid flow under installed conditions (IEC 65B/711/CDV:2009); German version FprEN 60534-2-1:2009
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— 56 стр.