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核岩 : 28 phrases in 9 subjects |
| Agriculture | 1 |
| Botany | 5 |
| Desert science | 2 |
| Earth sciences | 1 |
| Engineering geology | 1 |
| General | 2 |
| Geophysics | 3 |
| Oil / petroleum | 4 |
| Technology | 9 |
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