ISO 3:1973 优先数.优先数列

标准编号：ISO 3:1973

中文名称：优先数.优先数列

英文名称：Preferred numbers — Series of preferred numbers

发布日期：1973-04

标准范围

优选数是几何级数项值的常规四舍五入，包括10的整数幂，并具有特定表中规定的特殊系数。指定了基本系列、预期系列、R80系列和衍生系列。

Preferred numbers are the conventionally rounded of term values of geometrical series, including the integral powers of 10 and having as ratios special factors in accordance with the specified tables. Basic, expectional, R 80 and derived series are designated.

标准预览图