
Bs En 50065-1 - Signalling On Low-voltage Electrical Installations In The Frequency Range 3 Khz To 148,5 Khz - Part 1: General Requirements, Frequency Bands And Electromagnetic Disturbances
出版:British Standards Institution

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Bs En 50065-1 - Signalling On Low-voltage Electrical Installations In The Frequency Range 3 Khz To 148,5 Khz - Part 1: General Requirements, Frequency Bands And Electromagnetic Disturbances
出版:British Standards Institution
专家解读视频