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模 拟信号 : 81 phrases in 16 subjects |
| Air defense | 5 |
| Automobiles | 1 |
| Aviation | 7 |
| Construction | 1 |
| Earth sciences | 1 |
| Electronics | 14 |
| Engineering geology | 1 |
| Geophysics | 5 |
| Information technology | 3 |
| Metallurgy | 1 |
| Project management | 2 |
| Rail transport | 2 |
| Space | 11 |
| Sports | 1 |
| Technology | 25 |
| Telecommunications | 1 |
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