IEC: 439-1 - 1992 (Amendt. No.1 - 1995); Low-voltage switchgear and controlgear assemblies part 1- type-tested and partially type-tested assemblies

IEC: 439-1 - 1992 (Amendt. No.1 - 1995); Low-voltage switchgear and controlgear assemblies part 1- type-tested and partially type-tested assemblies - Geneva IEC 1995 - 17p

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