化工设备中常用的标准椭圆形封头顶点的径向应力比赤道处的径向应力（ ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='24905' and id < 2124972 and id<>'2124972' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24905' and id > 2124972 and id<>'2124972' order by id asc limit 5