开断（    ）时，由于开关设备的灭弧能力特别强，有可能出现截流过电压。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69490' and id < 4501404 and id<>'4501404' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69490' and id > 4501404 and id<>'4501404' order by id asc limit 5