sash pulley

例句：

1. 1.The car's engine is a heavy, oily machine that needs to be lubricated regularly with grease.
   汽车的引擎是一台沉重的机器，需要定期用油脂润滑。
2. 2. The engineer used a sash pulley to lift the heavy weights from the floor.
   工程师使用滑轮来从地板上抬起重物。
3. 3. The sash pulley was designed to allow for easy adjustment of the window shades.
   滑轮的设计是为了方便调整窗帘。