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refinação : 43 phrases in 15 subjects |
| Agriculture | 3 |
| Chemistry | 9 |
| Coal | 3 |
| Economy | 2 |
| Energy industry | 1 |
| Environment | 5 |
| Finances | 1 |
| Forestry | 1 |
| Industry | 9 |
| Information technology | 1 |
| Mechanic engineering | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Statistics | 1 |
| Technology | 3 |
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