同步发电机稳态短路电流不复大的原因是（        ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68477' and id < 4421352 and id<>'4421352' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68477' and id > 4421352 and id<>'4421352' order by id asc limit 5