
BS EN 50065-1 AMD1. 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 AMD1. 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