Based on a detailed analysis of error source, some measures for increase of observation accuracy have been suggested.
并较详细地分析了误差来源，提出一些提高观测精度的措施。
Analysis of error source in the measurement can help to find the way to eliminate error. Accordingly the ultrasonic thickness measurement can adapt well to the measurement of artillery body.
并过对测量过程中的误差源进行分析，找出相应的消除办法，从而将超声测厚技术更加完善的用于火炮身管的壁厚差测量中去。
This paper gives the research and the analysis about the error source and the erasing method of error on the grating angle sensor.
就光栅角度传感器的误差来源以及消除误差的措施进行分析和研究。
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