以圆矢量函数和媒介齿条为工具，推导了接触迹方程，讨论了接触迹的特性。
Using circle vector function and medium rack as tools, the equation of contact trace is deduced, and its characteristic is discussed.
介绍并推导双圆弧齿轮在安装误差影响下接触迹间载荷分配的计算公式和方法。
The load assignment formula and the method of the double circular arc gear under the wiring error influence between the contact mark was introduced and inferred.
揭示了基于点啮合原理的齿轮加工与测量的实质，并阐述了接触迹在齿轮加工与测量中的应用。
The gear machining and measuring essence based on the point engaging principle are revealed, moreover the application of contact trace in gear machining and measuring is expounded.
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