电力系统中电压类型包括（    ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69491' and id < 4501659 and id<>'4501659' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69491' and id > 4501659 and id<>'4501659' order by id asc limit 5