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冷却的空气 : 21 phrases in 11 subjects |
| Animal husbandry | 3 |
| Automobiles | 3 |
| Aviation | 1 |
| Earth sciences | 2 |
| Electronics | 2 |
| Mechanics | 1 |
| Plastics | 1 |
| Refrigeration | 2 |
| Space | 1 |
| Technology | 4 |
| Wind Energy | 1 |
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