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1·The theory of calculating geometric parameters of pitch cone of curved tooth hypoid gear is investigated in this paper.

本文研究了曲齿准双曲面齿轮分度锥面几何参数计算的原理。

2·According to the feature of epicycloid hypoid gear, a new method is proposed to calculate the geometric parameters of pitch cone accurately.

根据延伸外摆线准双曲面齿轮的特点，提出一种精确计算其分度锥面几何参数的新方法。

3·The limit pressure angle is related to such factors as offset angle, mean spiral angle, pitch cone angle and mean pitch cone diameter, not to geometrical shape of the tooth surface.

极限压力角受偏置角、大小轮的螺旋角、节锥角和中点的分度圆直径影响，而与齿面的其他参数无关等结论。

4·Conclusion: the cone artifact in ct image is related to such scanning parameters as pitch and the characters of the scanned objects.

临床照片中，锥形伪影突出表现在边界明显的部位。结论：锥形伪影与螺距和被扫描物属性存在确定关系。

5·There are many ways to measure base-level pitch diameter of cone-shaped thread.

检测圆锥管螺纹基面中径的方法有很多，但测量过程复杂。