Home / Standards / GB/T 40790-2021 GB/T 40790-2021 Active Sintered cerium-based and cerium-rich permanent magnet materials 烧结铈及富铈永磁材料 Standard Type GBT ICS 77.120.99 CCS H65 Status 现行 Issue Date 2021-10-11 Implementation 2022-05-01 Responsible Dept 国家标准委 Drafting Unit N/A