Home / Standards / GB/T 21220-2024 GB/T 21220-2024 Active Soft magnetic metallic materials 软磁金属材料 Standard Type GBT ICS 29.030 CCS K14 Status 现行 Issue Date 2024-09-29 Implementation 2025-04-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A