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介绍国家新标准GB／T1804－92《一般公差线性尺寸的未注公差》的主要内容及特点，并分析了推广实施该标准的重要意义．
This paper introduces the main contents and features of the new national standard GB / T1804-92, “Unmarked tolerance of linear tolerance of general tolerance” and analyzes the significance of popularizing and implementing this standard.