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《公差与配合》新旧国标系为两种不同的公差体制,严格地讲,二者不能进行等同的对比。因此,新旧国标的代换要在分析的基础上进行,以满足对产品的使用性能和经济性的要求。本文在新旧国标代换中就其要求、依据、条件,代换的方法,GB1801—79新旧国标配合极限对照表,新国标最佳值配合的处理方法四个方面进行分析。
“Tolerance and cooperation” Old and new national standard system for two different tolerance system, strictly speaking, the two can not be the same contrast. Therefore, the replacement of old and new national standard must be based on the analysis to meet the use of the product performance and economy requirements. In this paper, in the replacement of old and new national standard on its requirements, basis, conditions, substitution method, GB1801-79 old and new national standard with the limit table, the new national standard best value processing method with four aspects of analysis.