这十大品牌是如何评选出来的？

滚珠丝杠的中英文外文翻译： 中文：滚珠丝杠 英文：Ball Screw 外文翻译： A ball screw is a mechanical linear actuator that translates rotational motion to linear motion with little friction. A threaded shaft provides a helical raceway for ball bearings which act as a precision screw. As well as being able to apply or withstand high thrust loads, they can do so with minimum internal friction. They are made to close tolerances and are therefore suitable for use in situations in which high precision is necessary. The ball assembly acts as the nut while the threaded shaft is the screw. In contrast to conventional leadscrews, ballscrews tend to be rather bulky, owing to the need to have a mechanism to re-circulate the balls.