
Plastics piping systems for non-pressure underground drainage and sewerage - Polypropylene (PP) - Part 1: Specifications for pipes, fittings and the system
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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Plastics piping systems for non-pressure underground drainage and sewerage - Polypropylene (PP) - Part 1: Specifications for pipes, fittings and the system
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频