短語詞組短語backup impedance protection 后備阻抗保護backup p protection 備存保護circuit local backup protection 電路近后備保護substation local backup protection 變電站近后備保護operating backup protection 后備保護backup protection configuration 后備保護配置backup protection action 后備保護動作Centralized substation backup protection 變電站集中式后備保護transformer backup protection 變壓器后備保護 返回 backup protection