同时，减小滚动体的直径，以降低其离心力。

At the same time, reduce the diameter of the rolling body in order to reduce the centrifugal force.

youdao

同时，减小滚动体的直径，以降低其离心力。

At the same time, reduce the diameter of the rolling body in order to reduce the centrifugal force.

youdao