Vitrified clay pipe systems for drains and sewers Part 5: Requirements for perforated pipes and fittings
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频
Vitrified clay pipe systems for drains and sewers Part 5: Requirements for perforated pipes and fittings
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频