普通晶闸管内部有（）个PN结。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32648' and id < 2595944 and id<>'2595944' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32648' and id > 2595944 and id<>'2595944' order by id asc limit 5