IEC 61439-3-2012 Low-voltage switchgear and controlgear assemblies – Part 3 Distribution boards intended to be operated by ordinary persons （DBO）

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1、IEC61439-3®Edition1.02012-02INTERNATIONALSTANDARDNORMEINTERNATIONALELow-voltageswitchgearandcontrolgearassemblies–Part3:Distributionboardsintendedtobeoperatedbyordinarypersons(DBO)Ensemblesd'appareillageàbassetension–Partie3:Tableauxderépartitiondestinésàêtreutiliséspardespersonnesordinaires(D

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