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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 20224-2006 |
Determination of exposure index, ISO speed ratings, standard output sensitivity and recommended exposure index for digital still cameras 数码照相机曝光指数、ISO感光度值、标准输出灵敏度和推荐曝光指数的确定 |
China National Standards Determination exposure index, |
 English PDF |
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