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本文分析了借助水平仪或准直仪用间接方法测量平直度的测量误差，提出测量误差分为综合性和分量性的种形式的论点，同时还论述了检定误差的分析方法。
In this paper, we analyze the measurement error of the flatness by the indirect method of level or collimator, and put forward the argument that the measurement error is divided into comprehensive and component forms. At the same time, the analysis method of the verification error is also discussed.