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Norm

ISO 3:1973

Issue date: 1973 04 01

Preferred numbers — Series of preferred numbers

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 accorda...
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Valid
Publisher:
International Organization for Standardization
Format:
Digital | 4 Pages
Language:
English
ICS
17.020
Topics
Mechanical engineering foundations & materials, Metrology and measurement, Metrology and measurement in general

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.