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传输 频率 : 29 phrases in 12 subjects |
| Air defense | 4 |
| Aviation | 2 |
| Computer networks | 1 |
| Electronics | 5 |
| General | 1 |
| Information technology | 1 |
| Oil / petroleum | 3 |
| Project management | 1 |
| Semiconductors | 1 |
| Space | 1 |
| Technology | 7 |
| Telecommunications | 2 |
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