Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 5: EP-cores and associated parts for use in inductors and transformers (IEC 63093-5:2018); German version EN IEC 63093-5:2018
铁氧体磁芯.尺寸和表面不规则性限制指南.第5部分:电感器和变压器用EP磁芯和相关零件(IEC 63093-5-2018);德文版EN IEC 63093-5:2018