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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 321-2005 |
Preferred numbers-Series of preferred numbers 优先数和优先数系 |
China National Standards Preferred numbers Series |
 English PDF |
| GB/T 19764-2005 |
Guide to the choice of series of preferred numbers and of series containing more rounded values of Preferred numbers 优先数和优先数化整值系列的选用指南 |
China National Standards Preferred numbers Series |
English PDF |
| GB/T 19763-2005 |
Guide to the use of preferred numbers and of series of preferred numbers 优先数和优先数系的应用指南 |
China National Standards Preferred numbers Series |
English PDF |
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