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| rare earths; rare-earth elements | |||
| rare earth; rare earth element; rare earth metal | |||
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| rare earth; rare earth element; rare earth metal | |||
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tierras raras : 15 phrases in 6 subjects |
| Chemistry | 3 |
| Earth sciences | 6 |
| Electronics | 1 |
| Medical | 2 |
| Physical sciences | 1 |
| Technology | 2 |
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