连杆机构具有复演轨迹的功能并得到广泛应用。
Linkage mechanisms have the function of path generation and have been widely used in industry.
本文给出了能复演给定位置点的平面机构的优化设计方法。
An optimization on designing the planar four-bar linkage which is liable to reappear the location of a definite point is recommended.
音乐具有时间性 ，由于时间流动的单向性 ，音乐要被再次欣赏就得进行复演 ；
But owing to the unidirectivity of time flowage, music must be replayed in want of reappreciation.
单凸轮连杆组合机构可克服上述缺点，即可以方便地再现预定轨迹并有精确解，但其缺点是难以实现内凹曲线的轨迹复演。
Single CAM linkage mechanism can overcome the shortcomings mentioned above, however the new problem is that the mechanism can not generate the path which has concave curve.
单凸轮连杆组合机构可克服上述缺点，即可以方便地再现预定轨迹并有精确解，但其缺点是难以实现内凹曲线的轨迹复演。
Single CAM linkage mechanism can overcome the shortcomings mentioned above, however the new problem is that the mechanism can not generate the path which has concave curve.
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