限制切空载线路过电压的措施有（    ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69491' and id < 4501672 and id<>'4501672' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69491' and id > 4501672 and id<>'4501672' order by id asc limit 5