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| 通信数据系统 | |||
| communication data system: 23 phrases in 12 subjects |
| Agriculture | 1 |
| Air defense | 2 |
| Aviation | 6 |
| Business | 2 |
| Earth sciences | 1 |
| Electronics | 1 |
| Engineering geology | 1 |
| Geophysics | 1 |
| Information technology | 1 |
| Nautical | 1 |
| Space | 4 |
| Technology | 2 |
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