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| 高频测向站 | |||
| 高频测向台 | |||
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| 高频测向台 | |||
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| 高频测向台 | |||
| high-frequency direction finding station: 14 phrases in 7 subjects |
| Air defense | 3 |
| Aviation | 3 |
| Earth sciences | 1 |
| Electronics | 1 |
| General | 4 |
| Oil / petroleum | 1 |
| Radio | 1 |
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