Home / Standards / GB/T 9634.8-2018 GB/T 9634.8-2018 Abolished Ferrite cores—Guideline on the limits of surface irregularities—Part 8: PQ-cores 铁氧体磁心 表面缺陷极限导则 第8部分：PQ型磁心 Standard Type GBT ICS 29.100.10 CCS L19 Status 废止 Issue Date 2018-03-15 Implementation 2018-10-01 Responsible Dept 工业和信息化部（电子） Drafting Unit N/A