DIN CEN/TS 1451-2-2012 建筑物内渣土和废物倾倒用塑料管道系统(低温和高温).聚丙烯.第2部分:合格评定导则
Plastics piping systems for soil and waste discharge (low and high temperature) within the building structure - Polypropylene (PP) - Part 2: Guidance for the assessment of conformity; German version CEN/TS 1451-2:2012