diametral什么意思解释？

diametral的音标：diametral的英式发音音标为：[daɪ'æmɪtrəl]diametral的美式发音音标为：[daɪ'æmətrəl]...

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.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.Diametral pitch : the number of teeth ...