建筑排水中空壁消音硬聚氯乙烯管管道工程技术规程(附条文说明)
Technical specification for unplasticized polyvinyl chloride double-wall noise-reducing pipeline engineering of water sewerage in buildings
CECS 41-2004
建筑给水硬聚氯乙烯管管道工程技术规程(附条文说明)
Technical specification for PVC--U pipeline engineering for water supply in buildings