GB/T 33608-2017建筑排水用硬聚氯乙烯(PVC-U)结构壁管材国家标准
英文:Unplasticized poly(vinyl chloride) (PVC-U) structured-wall pipes for soil and waste discharge inside buildings GB/T 3...
英文:Unplasticized poly(vinyl chloride) (PVC-U) structured-wall pipes for soil and waste discharge inside buildings GB/T 3...