DIN EN ISO 15874-1-2013 冷热水装置用塑料管道系统.聚丙烯(PP).第1部分:总论(ISO 15874-1-2013).德文和英文版本EN ISO 15874-1-2013
Plastics piping systems for hot and cold water installations - Polypropylene (PP) - Part 1: General (ISO 15874-1:2013); German and English version EN ISO 15874-1:2013