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| 通风平巷; 通风巷道; 空降场 | |||
| air head: 23 phrases in 11 subjects |
| Architecture | 1 |
| Automobiles | 3 |
| Aviation | 2 |
| Construction | 2 |
| Electric machinery | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Hydroelectric power stations | 2 |
| Shipbuilding | 2 |
| Space | 1 |
| Technology | 6 |
| Wind Energy | 2 |
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