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| 大机群飞行 | |||
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mass -flight : 17 phrases in 9 subjects |
| Aviation | 1 |
| Earth sciences | 1 |
| Electronics | 7 |
| Life sciences | 1 |
| Metallurgy | 1 |
| Polymers | 2 |
| Refrigeration | 1 |
| Space | 1 |
| Technology | 2 |
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