变压器的铁芯由（ ）和铁轭两部分组成。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68476' and id < 4421214 and id<>'4421214' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68476' and id > 4421214 and id<>'4421214' order by id asc limit 5