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| over-the-horizon backscatter (雷达) | |||
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| over-the-horizon back scatter | |||
| over the horizon-backscatter radar | |||
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超视距后向散射 : 15 phrases in 4 subjects |
| Air defense | 7 |
| Aviation | 2 |
| Electronics | 2 |
| Space | 4 |
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