Meshing spur gears must have the same diametral pitch.

互相啮合的直齿圆柱齿轮，必须具有相同的径节。

This paper introduces a rarely seen method of describing with diametral distance.

本文介绍了一种鲜为人知的用直径距离描绘椭圆的方法。

The main principles of choosing a suitable diametral clearance are presented in...

最后文中还给出了轴承径向游隙选用的一般原则。

The main principles of choosing a suitable diametral clearance are presented in the paper.

最后文中还给出了轴承径向游隙选用的一般原则。

Universal gearbox allows inch, metric, diametral, and module pitch threads without changing gears.

通用变速箱允许英寸，公制，直径，螺距螺纹和模块不改变齿轮。