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| aerial delivery system; airline | |||
| air transportation system | |||
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空运 系统 : 51 phrases in 13 subjects |
| Air defense | 3 |
| Animal husbandry | 1 |
| Artificial intelligence | 1 |
| Aviation | 28 |
| Chemistry | 1 |
| Electronics | 1 |
| General | 1 |
| Metallurgy | 1 |
| Nautical | 1 |
| Remote sensing | 1 |
| Space | 4 |
| Technology | 6 |
| United States | 2 |
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