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声干扰 : 140 phrases in 21 subjects |
| Air defense | 25 |
| Artificial intelligence | 1 |
| Automobiles | 4 |
| Aviation | 5 |
| Computer networks | 1 |
| Construction | 1 |
| Earth sciences | 1 |
| Electric machinery | 1 |
| Electronics | 21 |
| General | 10 |
| Metallurgy | 1 |
| Multimedia | 1 |
| Navigation | 1 |
| Oil / petroleum | 4 |
| Radio | 1 |
| Shipbuilding | 3 |
| Space | 23 |
| Sports | 1 |
| Technology | 31 |
| Telecommunications | 3 |
| United Nations | 1 |
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