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每桶桶数 : 94 phrases in 11 subjects |
| Animal husbandry | 1 |
| Business | 2 |
| Chemistry | 1 |
| Earth sciences | 7 |
| Finances | 1 |
| General | 8 |
| Geology | 2 |
| Mining | 58 |
| Oil / petroleum | 9 |
| Oil processing plants | 2 |
| Technology | 3 |
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