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| 循环空气; 循环风 | |||
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circulating air : 32 phrases in 11 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Drilling | 2 |
| Earth sciences | 1 |
| General | 1 |
| Metallurgy | 2 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Plastics | 5 |
| Refrigeration | 1 |
| Technology | 16 |
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