The coupling similar switch, the joint or breaks to the power transmission function, therefore, any form's automobile has the engaging and disengaging gear, is only the form is different.
离合器类似开关，接合或断离动力传递作用，因此，任何形式的汽车都有离合装置，只是形式不同而已。现在，电子技术也进入了离合器系统。
Rationally define the work gear pump speed, gear and the axis of rotation to avoid engaging resonance frequency, can prevent noise intensified.
合理确定齿轮泵的工作转速，使齿轮与轴的转动避开啮合共振频率，可以防止噪声加剧。
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.
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。
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