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| assignment channel | |||
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分配信道 : 44 phrases in 9 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Communications | 2 |
| Computer networks | 4 |
| Electronics | 18 |
| Information technology | 4 |
| Space | 6 |
| Technology | 3 |
| Telecommunications | 5 |
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