GB/T 41422-2022压力输水用取向硬聚氯乙烯(PVC-O)管材和连接件标准
英文:Oriented unplasticized poly(vinyl chloride)(PVC-O) pipes and joints for the conveyance of water under pressure GB/T 4...
英文:Oriented unplasticized poly(vinyl chloride)(PVC-O) pipes and joints for the conveyance of water under pressure GB/T 4...