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| ground air communication; ground to air | |||
| ground-to-air communication | |||
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| earth-space communication | |||
| 地空通信: 55 phrases in 9 subjects |
| Air defense | 3 |
| Aviation | 15 |
| Earth sciences | 1 |
| Electronics | 12 |
| General | 3 |
| Information technology | 2 |
| Space | 10 |
| Technology | 5 |
| Telecommunications | 4 |
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