
Letter symbols to be used in electrical technology. Power generation, transmission and distribution
出版:British Standards Institution

專家解讀視頻
Pertains to generation, transmission, and distribution of electric energy.
? British Standards Institution 2013
IEC 60027-7 : 1.0 - Identical
EN 60027-7 : 2010 - Identical
IEC 60027-7 Ed. 1.0 - Identical