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電力半導體器件 參數符號

Directional relays and power relays with two input energizing quantities (IEC 60255-12: 1980 NEQ)
標準號:JB/T 5844-1991
Directional relays and power relays with two input energizing quantities (IEC 60255-12: 1980 NEQ)
標準號:JB/T 5844-1991