UNE EN 13598-2:2017現行
Plastics Piping Systems For Non-Pressure Underground Drainage And Sewerage - Unplasticized Poly(Vinyl Chloride) (Pvc-U), Polypropylene (Pp) And Polyethylene (Pe) - Part 2: Specifications For Manholes And Inspection Chambers
出版：Asociacion Espanola de Normalizacion
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