Home / Standards / GB/T 13820-2018 GB/T 13820-2018 Active Magnesium alloy castings 镁合金铸件 Standard Type GBT ICS 77.150.20 CCS J31 Status 现行 Issue Date 2018-07-13 Implementation 2018-08-01 Responsible Dept 国家标准委 Drafting Unit N/A