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本文提出“双节距测量法”，并用最小二乘平差法进行数据处理。可以采用现有的通用测试仪器，提高测量的准确度。可认为是直线度测量与数据处理的新方法。
In this paper, “double pitch measurement method” is proposed, and the data is processed by least squares adjustment. Existing universal testers can be used to improve the accuracy of the measurements. Can be considered as a new method of straightness measurement and data processing.