DIN EN 1401-1:2009
地下排水和排污水用塑料管道系统.未增塑聚氯乙烯.第1部分:管道,配件和系统用规范,英文版本DIN EN 1401-1:2009-07
Plastics piping systems for non-pressure underground drainage and sewerage - Unplasticized poly(vinyl chloride) (PVC-U) - Part 1: Specifications for pipes, fittings and the system; English version of DIN EN 1401-1:2009-07