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拉压杆（英文名称：lever）是一种机械装置，可用于通过改变力的方向和大小来传递力量。拉压杆是由一条杆体、一个力点（力矩中心）和一个支点组成。当力施加在力点上时，拉压杆会以支点为轴旋转，从而传递力量。拉压杆的来源可以追溯到古希腊时期，其中拉
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