IEC: 947 - 6 - 1 - 1989; Low-voltage switchgear and controlgear Part<6=six> Multiple function equipment Section One - Automatic transfer switching equipment
IEC: 947 - 6 - 1 - 1989; Low-voltage switchgear and controlgear Part<6=six> Multiple function equipment Section One - Automatic transfer switching equipment
- Geneva IEC 1989
- 77p
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