Home / Standards / GB/T 21219-2023 GB/T 21219-2023 Active Magnetic materials—Classification 磁性材料 分类 Standard Type GBT ICS 29.030 CCS L19 Status 现行 Issue Date 2023-11-27 Implementation 2024-06-01 Responsible Dept 中国电器工业协会 Drafting Unit N/A