Ferrite cores - Guide on the limits of surface irregularities - Part 1: General specification (IEC 60424-1:1999); German version EN 60424-1:1999— 6 стр.
Ferrite cores - Guidelines on the limits of surface irregularities - Part 1: General specification (IEC 60424-1:2015); German version EN 60424-1:2016— 13 стр.
Ferrite cores - Guide on the limits of surface irregularities - Part 3: ETD-cores and E-cores (IEC 60424-3:1999); German version EN 60424-3:1999— 10 стр.
Ferrite cores - Guidelines on the limits of surface irregularities - Part 1: General specification (IEC 60424-1:2015); German version EN 60424-1:2016— 13 стр.