同步发电机的短路特性是（      ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68475' and id < 4421152 and id<>'4421152' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68475' and id > 4421152 and id<>'4421152' order by id asc limit 5