LST EN 13476-2-2007 非压力地下排水和污水处理用塑料管道系统 未增塑聚(氯乙烯)(PVC-U)、聚丙烯(PP)和聚乙烯(PE)的结构壁管道系统 第2部分:光滑管道和管件规范
Plastics piping systems for non-pressure underground drainage and sewerage - Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) - Part 2: Specifications for pipes and fittings with smooth