
International Electrotechnical Vocabulary. Chapter 221: Magnetic materials and components
出版:International Electrotechnical Committee

专家解读视频
Replaces IEC 60050(901) (1973), 60050(901A) (1975) and 60050(901B) (1978). It has the status of a horizontal standard in accordance with IEC Guide 108
NEN IEC 60050-221:1991 - Identical
UNE 21302-221:1991 - Identical
PN IEC 50(221):1999 - Identical
NFC 01 221:1989 - Identical
BS 4727-1:GRP07:1991 - Equivalent
NEN 10050-221:1991 - Identical
IEV KAPITEL 221 - Identical