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| communication unit | |||
| 通信 单元: 42 phrases in 10 subjects |
| Air defense | 3 |
| Aviation | 3 |
| Business | 1 |
| Communications | 1 |
| Earth sciences | 1 |
| Electronics | 21 |
| Information technology | 4 |
| Space | 3 |
| Technology | 2 |
| Telecommunications | 3 |
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