
International Electrotechnical Vocabulary. Electronic tubes
出版:International Electrotechnical Committee

专家解读视频
It has the status of a horizontal standard in accordance with IEC Guide 108<
UNE 21302-531:1978 (R2000) - Identical
AS 1852.531-1975 - Identical
BS 4727-1:GRP06:1973 - Similar
NFC 01 531:1980 - Identical
IEV KAPITEL 531 - Identical
NEN 10050-531:1985 - Identical