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系统设定 : 21 phrases in 11 subjects |
| Air defense | 1 |
| Aviation | 5 |
| Electronics | 4 |
| Mechanics | 1 |
| Metallurgy | 1 |
| Nautical | 1 |
| Nuclear physics | 1 |
| Project management | 1 |
| Space | 3 |
| Technology | 1 |
| Telecommunications | 2 |
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