相同设计条件下，计算壁厚最小的封头是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24905' and id < 2124971 and id<>'2124971' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24905' and id > 2124971 and id<>'2124971' order by id asc limit 5