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pulley
英/pˈʊli/
美/ˈpʊɫi/
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01n.
滑车, 滑轮
a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope
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a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope