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並前往https://www.cesi.it/app/uploads/2020/11/KEMA-Labs-LV-White-Paper-IEC-61439-1-2020-WHATS-NEW.pdf

Low Voltage White Paper - CESI

IEC 61439 -1 :2020 WHAT'S NEW? Since its first release in 2009 for replacing the old IEC60439-1, the IEC61439 brought to the Low Voltage market.

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