Home / Standards / GB/T 31974-2015 GB/T 31974-2015 Active Passivated granular magnesium 钝化颗粒镁 Standard Type GBT ICS 77.140.99 CCS H54 Status 现行 Issue Date 2015-09-11 Implementation 2016-08-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A