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本文通过计量型控制图中最典型、有效、常用的均值和极差(X-R)图的建立和分析,说明了均值和极差(X-R)图的作用及在使用时应注意的问题。
In this paper, through the establishment and analysis of the most typical, effective and commonly used mean and range (X-R) graphs in a metrological chart, the effects of the mean and range (X-R) graphs and the problems to be aware of when using them are described.