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| 燃气发动机燃气空气混合气 | |||
| 烟气空气混合气 | |||
| 煤气空气混合物 | |||
| gas-air mixture: 5 phrases in 4 subjects |
| Automobiles | 1 |
| Ecology | 1 |
| Oil / petroleum | 1 |
| Technology | 2 |
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