Draft Document - Plastics piping systems for non-pressure underground conveyance and storage of non-potable water - Manholes, inspection chambers and road gullies for storm water systems made of unplasticized polyvinyl chloride (PVC-U), polypropylene (PP) and polyethylene (PE) - Part 2: Specification for road gullies; German and English version prEN 17670-2:2021
文件草案.非饮用水无压地下输送和储存用塑料管道系统.未增塑聚氯乙烯(PVC-U)、聚丙烯(PP)和聚乙烯(PE)制雨水系统用人孔、检查室和道路排水沟.第2部分:规范