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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 21541-2008 |
Chlorinated methanes for industrial use - Determination of purity - Gas chromatography 工业用氯代甲烷类产品纯度的测定 气相色谱法 |
China National Standards methanes |
 English PDF |
| GB/T 7375-2006 |
Fluorinated methanes for industrial uses―Determination of purity―Gas chromatography 工业用氟代甲烷类纯度的测定 气相色谱法 |
China National Standards methanes |
English PDF |
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