prolate involute

例句：

1. 1. The prolate involute is a shape that resembles a ball with a flat top and a curved bottom.
   扁球面蜗形轮是一种形状，类似于一个带有平顶和弯曲底部的球。
2. 2. In the study of mechanics, prolate involutes are used to describe the shape of gear teeth.
   在力学研究中，扁球面蜗形被用来描述齿轮齿的形状。
3. 3.The prolate involute has been found to have advantages in reducing friction and improving efficiency.
   研究发现，扁球面蜗形具有减少摩擦和提高效率的优点。