A third roller held the ball in place against the encoders while letting it revolve freely.
A third roller held the ball in place against the encoders while letting it revolve freely.
第三个轮子将使球在自由旋转的同时和译码器保持固定。
A third roller held the ball in place against the encoders while letting it revolve freely.
第三个轮子将使球在自由旋转的同时和译码器保持固定。