rotary bending

• 旋转弯曲

rotary bending的用法和样例：

例句

1. Hard rolling at the transitional section could improve the surface hardness and induce compressive residual stress, therefore to extend it's rotary bending fatigue life.
   在过渡圆角处进行表面滚压可提高表面强度及压应力，以延长活塞杆旋转弯曲疲劳寿命。