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气动效应 : 25 phrases in 10 subjects |
| Automobiles | 2 |
| Aviation | 4 |
| Ecology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Nautical | 1 |
| Rail transport | 3 |
| Shipbuilding | 1 |
| Space | 3 |
| Technology | 5 |
| Wind Energy | 4 |
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