ISO 21138-3. Plastics piping systems for non-pressure underground drainage and sewerage. Structured-wall piping systems of unplasticized poly(vinylchloride) (PVC-U), polypropylene (PP) and polyethylene (PE). Part 3.Pipes with a non-smooth external surface (all materials), type B
ISO 21138-3 无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)的结构化壁管系统 第三部分 B型非光滑外表面管道(所有材料)
发布日期:
2006-03-13
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