Résumé
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.
Cycle de vie
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Actuellement
PubliéeISO 3:1973
Les normes ISO sont réexaminées tous les cinq ans
Stade: 90.20 (En cours d'examen)