Gears with curvilinear traces ensure that the gear pair is operated in a point contact condition, which is different from the line contact type of a helical gear pair or spur gear pair.

• 不同于以往传统正齿轮与螺旋齿轮的线接触型的传动运转方式，具曲线型齿线特徵的齿轮组是以点接触的接触型态来传输动力。