圆外旋轮线的英文

epicycloid

• 圆:    round; circular; s ...
• 外:    outside; external ...
• 旋:    whirl
• 线:    thread; string; wi ...

例句与用法

1. He investigates geometrical properties of cycloids, epicycloids, and hypocycloids .
   他研究了摆线、圆外旋轮线和四点圆的旋轮线的几何性质。