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机载试验 : 31 phrases in 9 subjects |
| Automobiles | 1 |
| Aviation | 6 |
| Earth sciences | 2 |
| Electronics | 5 |
| Hydroelectric power stations | 1 |
| Metallurgy | 3 |
| Shipbuilding | 1 |
| Space | 5 |
| Technology | 7 |
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