IEC: 947-6-1 - 1989 (Amendt No.1 - 1994); Low-voltage switchgear and controlgear Part 6 - Multiple function equipment section 1: Automatic transfer switching equipment

IEC: 947-6-1 - 1989 (Amendt No.1 - 1994); Low-voltage switchgear and controlgear Part 6 - Multiple function equipment section 1: Automatic transfer switching equipment - Geneva IEC 1994 - 5p

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