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| 外界空气 | |||
| 新风; 室外空气 | |||
| outside air: 33 phrases in 10 subjects |
| Automobiles | 2 |
| Aviation | 5 |
| Electronics | 1 |
| General | 3 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Refrigeration | 9 |
| Space | 3 |
| Technology | 6 |
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