异步电动机定、转子之间的气隙越小越好是因为（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30223' and id < 2444884 and id<>'2444884' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30223' and id > 2444884 and id<>'2444884' order by id asc limit 5