For a ball rolling across the floor, that outside force could be the friction between the ball and the floor, or it could be the toddler that kicks the ball in another direction.
对于一个在地面上滚动的球而言，外力可能是球与地面之间的摩擦力或者幼童相反方向踢球产生的力。
The clamping of the friction disk is caused by the outwardly rolling of the steel ball along the slop rolling track under eccentric force.
离合器摩擦片的压紧是由钢球在离心力作用下沿斜面滚道向外滚动而引起的。
It was indicated that enhancing the friction between the material and the rotary kiln wall is easy to carry out the rolling motion from the aspect of force moment.
本文从力矩的角度出发，得出了要实现物料的滚落状态，可以提高物料与窑壁间的摩擦系数，并提出了具体方法。
The formula for calculating the rolling friction factor was developed and established. Based on the analysis of central force action, the formula for circumferential force action is developed.
在完成中心动力作用下的摩擦系数计算公式后，继续用计算法确定周动力作用下的滚动摩擦系数。
The formula for calculating the rolling friction factor was developed and established. Based on the analysis of central force action, the formula for circumferential force action is developed.
在完成中心动力作用下的摩擦系数计算公式后，继续用计算法确定周动力作用下的滚动摩擦系数。
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