pul·ley
noun/ˈpʊli/
/ˈpʊli/
- a wheel or set of wheels over which a rope or chain is pulled in order to lift or lower heavy objects
enlarge image滑轮；滑轮组；滑车 - a system of ropes and pulleys
绳索滑轮系统 - The scenery was moved across the stage by ropes and pulleys.
布景通过绳索和滑轮在舞台上移动。 - a system of chains passing over pulleys
通过滑轮的链条系统
Word OriginMiddle English: from Old French polie, probably from a medieval Greek diminutive of polos ‘pivot, axis’. - a system of ropes and pulleys