The error can be avoided by increasing the gear grinding allowance in length of common normal line to grind gear.

此误差可通过在公法线长度方向上加大留磨量，进行磨齿予以消除。

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Introduces the rationale and techniques of common normal length measurement in the test and mapping of parameters for gears.

介绍了齿轮精度检测和齿轮参数测绘中用公法线长度测量的基本原理和基本方法。

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After iterative and rigorous practice, it turned out that it can meet the demand when using length of common normal to measure gears modulus.

经过严密计算和实践反复验证，用公法线长度测绘法确定齿轮模数可满足要求。

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