UNE-EN IEC 63182-4:2022 Magnetic powder cores - guidelines on dimensions and the limits of surface irregularities - Part 4: Block-cores (Endorsed by Asociación Española de Normalización in March of 2022.)
2022UNE-EN IEC 63182-4:2022 Magnetic powder cores - guidelines on dimensions and the limits of surface irregularities - Part 4: Block-cores (Endorsed by Asociación Española de Normalización in March of 2022.)