nonperpendicularity
n. 不垂直度
例句
In this article, the method is described for measuring the scales of the two coordinate axes of a CCD plate through astronomical observations and the nonperpendicularity of the axes.
本文叙述了用天文观测测定CCD片子上两坐标各自比例尺和两坐标轴不垂直度的方法；
