为了减少旋转磁场在铁芯中引起的涡流损耗和磁滞损耗，定子铁芯一般由导磁性能较好的冲有一定槽型的（ ）叠压而成。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30222' and id < 2444846 and id<>'2444846' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30222' and id > 2444846 and id<>'2444846' order by id asc limit 5