
High-voltage Alternating Current Circuit-breakers - Service Conditions - Rating, Construction And Design
出版:Polish Committee for Standardization

专家解读视频
1989 [30/12/1989]
IEC 60056 : 4.0 - Identical
IEC 60056 : 4.0 - Identical
HD 348 : 200S7 - Identical
HD 348:1998 - Identical
IEC 60056 Ed. 4.0 - Identical