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| 气体抽取 | |||
| 天然气的开采 | |||
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gas extraction : 20 phrases in 12 subjects |
| Business | 1 |
| Desert science | 1 |
| Economy | 1 |
| Electric machinery | 1 |
| Electronics | 2 |
| Environment | 1 |
| Geology | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Oil processing plants | 1 |
| Technology | 3 |
| Water resources | 4 |
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