principal axis of stress

• 应力主轴

principal axis of stress的用法和样例：

例句

1. The crystal axes and the principal stress axes are obtained from the optical indicatrix axes manually by turning the projection diagram as usual.
   以往是通过手工转图由光率体主轴获取晶轴和应力主轴的，把手工操作变为计算机运算和成图，是一个重要的附加课题。