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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 13072-2010 |
Geological water samples - Determination of radioactive ratio 226Ra/228Ra - Emanation - β counting techniques 地质水样 226Ra/228Ra 放射性活度比值测定 射气法 - β 法 |
China National Standards 228Ra |
 English PDF |
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