交流供电系统由交流供电线路、低压交流配电屏、（ ）等部分组成。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28963' and id < 2357865 and id<>'2357865' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28963' and id > 2357865 and id<>'2357865' order by id asc limit 5