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GB/T 12690.4-2003
GB/T 12690.4-2003 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Determination of oxygen and nitrogen content—Impulse-infrared and impulse-thermal conductance absorption method
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Replaced |
| Standard Code | GB/T 12690.4-2003 |
| CCS | Rare earth metals and their alloys |
| ICS | Other non-ferrous metals and their alloys |
| Implement Date | 2004-06-01 |
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