软盘驱动器采用的磁头是 。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29992' and id < 2430574 and id<>'2430574' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29992' and id > 2430574 and id<>'2430574' order by id asc limit 5