Fixed firefighting systems - Components for sprinkler and water spray systems - Part 2: Wet alarm valve assemblies (includes Amendment A1:2001); German version EN 12259-2:1999 + A1:2001
固定消防系统.洒水器和喷水系统的部件.第2部分:湿式报警阀组件(包括修改件A1:2001);德文版EN 12259-2:1999+A1:2001