刀开关在选用时，要求刀开关的额定电压要大于或等于线路实际的（）电压。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27224' and id < 2260101 and id<>'2260101' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27224' and id > 2260101 and id<>'2260101' order by id asc limit 5