Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 6: ETD-cores for use in power supplies (IEC 63093-6:2018); German version EN IEC 63093-6:2018
铁氧体磁芯.尺寸和表面不规则度限值指南.第6部分:电源用ETD磁芯(IEC 63093-6-2018);德文版EN IEC 63093-6:2018