颈椎椎管的测量用圭表颈椎侧位X线平片，归纳起来有下述办法： 2．1颈椎管矢状（前后）中径测量（Burrows）这个办法，简略单纯易行，但因球管与胶片间距差别，放大率亦异。
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介绍自行开发的内螺纹中径测量装置的构成、原理和使用方法。
This paper introduces the structure, the principle and the operation of a device measuring inside screw developed by the authors.
提供了一种简便易行、准确可靠的测量内螺纹单一中径的手段。
A simple, easy to use, correct and reliable for measurement of single pitch diameter of inner thread is provided.
运用几何光学测量物体尺寸的理论和方法，设计了一种基于线阵图像传感器的线径测量系统中的成像系统。
The general theory and methods from geometrical optics to measure the dimension of an object were applied to design a diameter measuring system, which was based on a linear array image sensor.
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