DIN CEN/TS 13476-4-2008 非受压地下排水和排污用塑料管道系统.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4部分:一致性评估用指南
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 4: Guidance for the assessment of conformity; German