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| 注频: 21 phrases in 12 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Economy | 2 |
| Electronics | 3 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Information technology | 1 |
| Metallurgy | 1 |
| Multimedia | 1 |
| Project management | 1 |
| Space | 1 |
| Technology | 5 |
| Telecommunications | 3 |
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