VITRIFIED CLAY PIPE SYSTEMS FOR DRAINS AND SEWERS - PART 5: REQUIREMENTS FOR PERFORATED PIPES AND FITTINGS
出版:Comite Europeen de Normalisation
专家解读视频
VITRIFIED CLAY PIPE SYSTEMS FOR DRAINS AND SEWERS - PART 5: REQUIREMENTS FOR PERFORATED PIPES AND FITTINGS
出版:Comite Europeen de Normalisation
专家解读视频