砂轮主轴与电机一体，采用预加载荷的高精度滚动轴承。

Wheel spindle and motor is either designed to use preload super precision ball bearing in a case.

youdao

砂轮主轴与电机一体，采用预加载荷的高精度滚动轴承。

Wheel spindle and motor is either designed to use preload super precision ball bearing in a case.

youdao