利用坐标轴旋转公式，对其工艺计算方便适用。
The rotation formula of coordinate axis is used to be it's convenient and useful for process calculation.
应用矢量旋转公式及连杆运动约束方程，我们可以求得连杆转角及连杆曲线上点的坐标值。
With the aid of the formula for the rotation of a vector and constraint equations for the connecting rod, the rotation Angle and the coordinates of path points of the connecting rod can be obtained.
转换旋转矩阵中要素的公式，这里我们可以发现简洁和紧促清晰可见。
Formula of an element in the shift and rotation matrix. Simplicity and compactness are clearly visible.
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