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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 41042-2021 |
Guidance for utilization and classification of content of valuable elements in coal 煤中有价元素含量分级及应用导则 |
China National Standards valuable |
 English PDF |
| GB/T 39203-2020 |
Technical specifications for extraction of valuable metals from copper smelting dust 铜冶炼烟灰提取有价金属技术规范 |
China National Standards valuable |
English PDF |
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