principal plane of stress

例句：

1. 1. The design of the bridge is based on the principal plane of stress.
   桥梁的设计基于主应力平面。
2. 2.The engineer calculated the principal plane of stress in the structure.
   工程师计算了结构中的主要应力平面。
3. 3. In this case, the principal plane of stress is the most critical factor to consider.
   在这种情况下，主要应力平面是需要考虑的最关键因素。