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颗粒数 : 40 phrases in 14 subjects |
| Agriculture | 1 |
| Automobiles | 1 |
| Desert science | 1 |
| Drilling | 1 |
| Earth sciences | 1 |
| Ecology | 2 |
| Engineering geology | 2 |
| General | 1 |
| Geology | 1 |
| Isolation | 1 |
| Metallurgy | 3 |
| Mining | 1 |
| Oil / petroleum | 1 |
| Technology | 23 |
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