他研究了擺線 、 圓外旋輪線和四點(diǎn)圓的旋輪線的幾何性質(zhì).He investigates geometrical properties of cycloids , epicycloids, and hypocycloids.由于這個(gè)緣故,擺線又叫做等時(shí)曲線.For this reason the cycloid is called the tautochrone.分析擺線鋼球行星傳動(dòng)減速器的振動(dòng)特性.The vibration perfo...