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| directive beacon | |||
| directional beacon | |||
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定向信标 : 18 phrases in 9 subjects |
| Air defense | 3 |
| Aviation | 2 |
| Business | 1 |
| Electronics | 1 |
| General | 3 |
| Navigation | 1 |
| Radio | 1 |
| Space | 1 |
| Technology | 5 |
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