Generally, base point method is used when we analyze the acceleration of a paint in the plane figure, we seldom use the instantaneous center method.
分析平面图形上点的加速度问题一般采用基点法，很少采用瞬心法。
The characteristics of the acceleration of the instantaneous velocity center (IVC) were presented, and the trajectory equation for pure rolling of rigid body (PRORB) was developed.
分析了瞬心的加速度特性，建立了刚体平面纯滚动的轨迹方程。
To analyse accelerations of points on plane figure generally the method of base point and the method of instantaneous acceleration center are used.
分析平面图形上点的加速度问题通常用基点法和瞬心法。
Two methods of establishing acceleration instantaneous center place, namely, a round of outside connection method and a formula method are described.
提出了求加速度瞬心的两种方法，即外接圆法和公式法。
Two methods of establishing acceleration instantaneous center place, namely, a round of outside connection method and a formula method are described.
提出了求加速度瞬心的两种方法，即外接圆法和公式法。
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