三相异步电动机运行时，机械负载增大，说法正确的是（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69445' and id < 4497283 and id<>'4497283' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69445' and id > 4497283 and id<>'4497283' order by id asc limit 5