Home / Standards / GB/T 44069.4-2024 GB/T 44069.4-2024 Active Ferrite cores—Guidelines on dimensions and the limits of surface irregularities—Part 4: RM-cores 铁氧体磁心 尺寸和表面缺陷极限导则 第4部分:RM型磁心 Standard Type GBT ICS 29.100.10 CCS L 19 Status 现行 Issue Date 2024-05-28 Implementation 2024-12-01 Responsible Dept 工业和信息化部(电子) Drafting Unit N/A