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| 气体技术 | |||
| gas technology: 13 phrases in 9 subjects |
| Earth sciences | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Metallurgy | 2 |
| Mining | 3 |
| Nautical | 1 |
| Oil / petroleum | 2 |
| Oil processing plants | 1 |
| Space | 1 |
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