The size of the circles and the distance between the balls are stated as follows: （1）Outer circle of the rings ：Radius 2/100h(2%) （2）Inner circle of the rings ：Radius 1/100h(1%) （3）The distance between the balls: Horizontal direction 315KHz(approx. 2/25h) Vertical direction 900Hz (approx. 1/14h)
