绝缘材料的耐热等级为E级时，其极限工作温度为（）T：。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27218' and id < 2260326 and id<>'2260326' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27218' and id > 2260326 and id<>'2260326' order by id asc limit 5