The best precise observe data of optics is a standard of compare to estimate the constant error of radar in accuracy check flying and project.
光学设备测量数据因精度高而一般成为雷达精度校飞、实测数据固定偏差估计的比较标准。
The problem of error estimate in the primary measurement, the selection of measuring instrument accuracy and the calculation of the effective data are discussed and explained with examples.
讨论了物理实验基础知识中一次测量的误差估计、测量仪器精度的选择和有效数字运算等问题，并以实例予以说明。
Since with common calculation method, the calculated value of feeder shaping roller of ultra-accuracy grinder is approximate, it is hard to estimate its calculation error.
超精加工机床辊子装置的计算都具有近似性，很难估算计算误差，讨论了无心超精加工机床加工外凸滚子成形时机床辊子的解析解。
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