接触线

contact wire的用法和样例：

例句

The line of contact is longer and the contact ratio is bigger, the meshing stationarity is good.渐开线弧齿圆柱齿轮具有较长的齿面接触线和较大的啮合重合度，齿轮副啮合平稳性好。
The creeping flow model is singular and therefore unrealistic in the corner of each of the two fluid phases at a moving line of contact.悄悄流模型的奇异的，因此是不现实的角落里的每一个阶段的两个流体在移动接触线。

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