转子串频敏变阻器启动时的原理为（）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27220' and id < 2260236 and id<>'2260236' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27220' and id > 2260236 and id<>'2260236' order by id asc limit 5