Plastics piping systems for water supply and for buried and above-ground drainage and sewerage under pressure - Unplasticized poly(vinyl chloride) (PVC-U) - Part 2: Pipes (ISO 1452-2:2009)
供水和埋地及地上压力排水和排污用塑料管道系统.未增塑聚氯乙烯(PVC-U).第2部分:管道(ISO 1452-2-2009)