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| 紧急救援无线电信标 | |||
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emergency beacon : 28 phrases in 10 subjects |
| Air defense | 1 |
| Aviation | 7 |
| Communications | 1 |
| Electronics | 4 |
| General | 1 |
| Information technology | 2 |
| Nautical | 2 |
| Shipbuilding | 2 |
| Space | 1 |
| Technology | 7 |
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