UNE-EN IEC 63093-4:2019 Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 4: RM-cores (Endorsed by Asociación Española de Normalización in June of 2019.)
2019UNE-EN IEC 63093-4:2019 Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 4: RM-cores (Endorsed by Asociación Española de Normalización in June of 2019.)