双母双分段接线，按双重化配置四台母线电压合并单元，需考虑（   ）电压并列。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='55173' and id < 3483426 and id<>'3483426' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='55173' and id > 3483426 and id<>'3483426' order by id asc limit 5