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| 稀有金属 | |||
| 稀土金属 | |||
| 贵金属 | |||
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| 稀有金属 | |||
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rare metal : 37 phrases in 12 subjects |
| Automobiles | 1 |
| Chemistry | 2 |
| Desert science | 1 |
| Earth sciences | 1 |
| Ecology | 1 |
| Electronics | 2 |
| International trade | 3 |
| Metallurgy | 12 |
| Oil / petroleum | 2 |
| Refrigeration | 2 |
| Technology | 9 |
| Wind Energy | 1 |
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