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| 油和天然气: 37 phrases in 14 subjects |
| Automobiles | 2 |
| Company name | 3 |
| Drilling | 2 |
| Earth sciences | 7 |
| Economy | 2 |
| Finances | 1 |
| Geology | 2 |
| Geophysics | 1 |
| Mechanics | 1 |
| Metallurgy | 1 |
| Mining | 2 |
| Oil / petroleum | 9 |
| Technology | 3 |
| Telecommunications | 1 |
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