Installation systems for gas installation inside buildings, consisting of multi-layer composite pipes and their corresponding fittings, for an operating pressure <kleiner => 100 mbar - Part 2: Conformity assessment; Text in German and English
工作压力为100毫巴的由多层复合管及其相应配件组成的建筑物内气体安装用安装系统.第2部分:合格评定;德语和英语文本