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| 油气比 | |||
| 气体常数 | |||
| gas factor: 30 phrases in 7 subjects |
| Chemistry | 1 |
| Economy | 1 |
| Electronics | 4 |
| Geophysics | 1 |
| Mining | 6 |
| Oil / petroleum | 8 |
| Technology | 9 |
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