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| 无线电导航术 | |||
| 无线电导航 (radionavigatio) | |||
| 无线电导航 | |||
| radionavigation: 15 phrases in 5 subjects |
| Air defense | 1 |
| Electronics | 4 |
| General | 1 |
| Information technology | 2 |
| Space | 7 |
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