GB/T 39506-2020硬聚氯乙烯(PVC-U)管材及管件中聚氯乙烯(PVC)含量的测定基于总氯含量的方法标准
英文:Determination of the poly vinyl chloride (PVC) content of unplasticized poly vinyl chloride (PVC-U) pipes and fitting...
英文:Determination of the poly vinyl chloride (PVC) content of unplasticized poly vinyl chloride (PVC-U) pipes and fitting...