BS EN 295-5. Vitrified clay pipe systems for drains and sewers. Part 5. Requirements for perforated pipes and fittings
出版:British Standards Institution
专家解读视频
BS EN 295-5. Vitrified clay pipe systems for drains and sewers. Part 5. Requirements for perforated pipes and fittings
出版:British Standards Institution
专家解读视频