变压器正常运行时，变压器的温度达到稳定时的温升称为（        ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68477' and id < 4421293 and id<>'4421293' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68477' and id > 4421293 and id<>'4421293' order by id asc limit 5