DIN EN 12666-1:2006 无压地下排水和排污塑料管道系统.聚丙烯(PP).第1部分:管道、配件和系统规范.德文版本EN 12666-1-2005
Plastics piping systems for non-pressure underground drainage and sewerage - Polyethylene (PE) - Part 1: Specifications for pipes, fittings and the system; English version of DIN EN 12666-1:2006-03