转子为圆柱形，气隙均匀的同步电机为（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69324' and id < 4488052 and id<>'4488052' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69324' and id > 4488052 and id<>'4488052' order by id asc limit 5