方法引用综合指数指标并对质量指标进行标准化处理，用质控图的形式表示出来。
Methods: a Comprehensive index is introduced. The quality index is standardized and presented in quality control graph.
方法引用综合指数指标并对质量指标进行标准化处理，用质控图的形式表示出来。
Methods: a Comprehensive index is introduced. The quality index is standardized and presented in quality control graph.
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