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| convection wave | |||
| 对流 波: 21 phrases in 9 subjects |
| Air defense | 6 |
| Aviation | 1 |
| Communications | 2 |
| Electronics | 2 |
| Finances | 1 |
| Radio | 1 |
| Space | 2 |
| Technology | 2 |
| Telecommunications | 4 |
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