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| radio relay | |||
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| radio relay station | |||
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无线电中继 : 44 phrases in 10 subjects |
| Air defense | 8 |
| Aviation | 5 |
| Communications | 3 |
| Electronics | 6 |
| General | 1 |
| Information technology | 1 |
| Nautical | 1 |
| Space | 8 |
| Technology | 8 |
| Telecommunications | 3 |
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