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划频 : 39 phrases in 15 subjects |
| Advertising | 2 |
| Air defense | 3 |
| Aviation | 2 |
| Communications | 1 |
| Electronics | 5 |
| General | 1 |
| Oil / petroleum | 1 |
| Radio | 1 |
| Rowing | 6 |
| Shipbuilding | 1 |
| Space | 3 |
| Swimming | 3 |
| Technology | 2 |
| Telecommunications | 6 |
| United States | 2 |
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