定滑轮

例句：

1. 1.The pulley system is a crucial component in the transmission system of an automobile.
   滑轮系统是汽车传动系统中的关键部件。
2. 2.The engineer used a special lever to adjust the tension of the rope, which was connected to the pulley system.
   工程师使用特殊的杠杆调整绳索的张力，这根绳索与滑轮系统相连。
3. 3. The weight of the object being lifted by the pulley system is determined by the distance between the pulley and the object.
   被滑轮系统提升的物体的重量取决于滑轮和物体之间的距离。