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滑轮是一个周边有槽，能够绕轴转动的小轮。由可绕中心轴转动有沟槽的圆盘和跨过圆盘的柔索（绳、胶带、钢索、链条等）所组成的可以绕着中心轴旋转的简单机械叫做滑轮。 在生产生活中，滑轮的应用大大提高了生产效率，给我们的生活带来了极大的便利。在生产生活中应用的滑轮，主要有定滑轮，动滑轮以及滑轮组。 定滑轮 滑轮组 滑轮的凹槽样式主要分为：U型、V型、H型三类。 A pulley is a small wheel with a grooves around the shaft and can be rotated around the axis. A simple machine consisting of a grooved groove that can rotate around a central shaft and a flexible rope that crosses the disk (rope, tape, steel rope, chain, etc.) is a simple machine that can revolve around the central axis, called a pulley. in the production and life, the use of pulley greatly improved production efficiency and brought great convenience to our life. The pulleys used in production and life mainly include the fixed pulley, the dynamic pulley and the pulley. The groove styles of the pulley in the pulley pulley group are divided into three types: U, V and H.