GB/T 20975.4—2020《铝及铝合金化学分析方法 第4部分:铁含量的测定》修订研究

Research on the Revision of GB/T20975.4-2020, Methods for chemical analysis of aluminium and aluminium alloys——Part 4: Determination of iron content

本文简要介绍了GB/T 20975.4—2020的修订原则和标准结构,重点介绍了标准的主要修订内容,阐述了新标准的特点和创新点。

This paper briefly introduces the revision principles and standard structure of GB/T20975.4-2020, focuses on the main revision content of the standard, and explains the characteristics and innovations of the new standard.