电机铁芯损耗与（   ）有关。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69320' and id < 4487840 and id<>'4487840' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69320' and id > 4487840 and id<>'4487840' order by id asc limit 5