Various speeds may be obtained by the use of large and small pulleys.

利用大小皮带轮可以获得不同的转速.

Drive unit, with motor, pulleys , universal couplings able to drive the machine units.

驱动单元, 包含电机, 皮带轮, 和通用配件,共同驱动机器转动.

Most owners probably found a slower motor and used smaller pulleys in an attempt to get around this problem.

大多数业主可能发现较慢的汽车和使用较小的皮带轮在一个尝试，就是希望能解决这个问题。

On the campaign servo motor through a pair of circular tooth pulleys, belts, one pair of anti-backlash gear and ball screw deceleration drive;

工作台运动由伺服电机通过两个圆弧齿形皮带轮，和圆弧齿形皮带降速传动。

Use pulleys to lift the heavy load.

使用滑轮来提升重物。

Pulleys can change the direction of a force.

滑轮可以改变力的方向。

The engineer explained how pulleys work in the system.

工程师解释了滑轮在系统中的工作原理。

The mechanic installed pulleys to improve the machine's efficiency.

机械师安装了滑轮以提高机器的效率。

They used a series of pulleys to move the large object.

他们使用了一系列滑轮来移动大物体。

What is the use of pulleys?

滑轮的作用是什么？