Home / Standards / GB/T 38521-2020 GB/T 38521-2020 Abolished Gas analysis—Purity analysis and the treatment of purity data 气体分析 纯度分析和纯度数据的处理 Standard Type GBT ICS 71.100.20 CCS G86 Status 废止 Issue Date 2020-03-06 Implementation 2021-02-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A