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| 空气燃烧 | |||
| air combustion: 47 phrases in 11 subjects |
| Automobiles | 2 |
| Aviation | 2 |
| Environment | 1 |
| General | 1 |
| Metallurgy | 21 |
| Nautical | 1 |
| Rail transport | 1 |
| Shipbuilding | 1 |
| Space | 1 |
| Steel production | 1 |
| Technology | 15 |
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