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| 表面气体 | |||
| surface gas: 27 phrases in 10 subjects |
| Agriculture | 1 |
| Drilling | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Geophysics | 1 |
| Metallurgy | 4 |
| Mining | 1 |
| Oil / petroleum | 10 |
| Sports | 1 |
| Technology | 5 |
| Wind Energy | 1 |
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