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| 跟踪与通信系统 | |||
| tracking and communications: 37 phrases in 9 subjects |
| Air defense | 2 |
| Aviation | 8 |
| Communications | 1 |
| Earth sciences | 1 |
| Electronics | 7 |
| General | 2 |
| Space | 14 |
| Technology | 1 |
| Telecommunications | 1 |
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