
Building intercom systems Part 2: Requirements for advanced security building intercom systems (ASBIS) (IEC 62820-2:2017)
出版:Verband Deutscher Elektrotechniker

专家解读视频
EN IEC 62820-2 : 2018 - Identical
DIN EN IEC 62820-2 : 2018-09 - Identical
IEC 62820-2 : 1ED 2017 - Identical
DIN EN IEC 62820-2 : 2018-09 - Identical
IEC 62820-2 : 1ED 2017 - Identical