电机铁芯一般工作在磁化曲线的（   ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69469' and id < 4498952 and id<>'4498952' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69469' and id > 4498952 and id<>'4498952' order by id asc limit 5