This paper introduces the definition, classification and sources of the measurement uncertainty, as well as the methods and steps of the evaluation of measurement uncertainty.
文章对测量不确定度的定义，分类及来源进行了阐述，并且讲述了测量不确定度的评定方法和步骤。
The definitions, classification, steps and method of evaluation, report and expression, significant places of number etc. for measurement uncertainty were also discussed in the paper.
就不确定度的定义、分类、评定步骤和方法、报告与表示、有效位数等问题进行了讨论。
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