A spirograph-type curve such as would be obtained by rolling around the outside of an ellipse (major and minor axes of 2 and 1 respectively) a circle with radius 0.185 for three revolutions, the drawing point being 2.22 from the circle's centre.
輪盤曲線18
ellipse、epitrochoid、roulette、spiral、spirograph
橢圓、外旋輪線、輪盤賭、螺旋、萬花尺
資料來源：openclipart ( https://openclipart.org/ )