美利体育登录入口官网:BS EN 13598-1:2020
无压力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).包括浅层检验室在内的辅助配件规范
Plastics piping systems for non-pressure underground drainage and sewerage. Unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE). Specifications for ancillary fittings including shallow inspection chambers