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由GB/T 1800.3—1998《极限与配合 基础 第3部分:标准公差与基本偏差数值表》所确定的孔的基本偏差数值,与由(已被代替的)GB/T 1800—1979《公差与配合 总论 标准公差与基本偏差》所确定的孔的基本偏差数值相比较,其数值虽无变化,但它们确定数值的依据却有着根本的差
GB / T 1800.3-1998 “limit and the basis of the third part: standard tolerances and basic deviation table” determined by the hole basic deviation values, and by the (has been replaced) GB / T 1800-1979 “tolerance and Compared with the basic deviation value of the holes determined by the standard tolerance and the basic deviation ”, although there are no changes in the numerical values, the basis for determining the values is fundamentally different