DIN EN 1401-1:2019-09 用于非压力地下排水和污水处理的塑料管道系统 未增塑聚乙烯
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; German version EN 1401-1:2019 / Note: To be amended by DIN EN 1401-1/A1...