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| 自然通风〔冷却〕的 (cooled) | |||
| 自然空气 | |||
| 自然空气冷却 (cooled) | |||
| air natural: 36 phrases in 12 subjects |
| Automobiles | 1 |
| Business | 1 |
| Ecology | 1 |
| Electric machinery | 1 |
| Electronics | 6 |
| Hydroelectric power stations | 3 |
| Mechanics | 1 |
| Metallurgy | 1 |
| Refrigeration | 1 |
| Technology | 18 |
| Telecommunications | 1 |
| Wind Energy | 1 |