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| 监视卫星; 侦察卫星 | |||
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surveillance satellite : 40 phrases in 10 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Business | 3 |
| Earth sciences | 3 |
| Electronics | 1 |
| General | 1 |
| Nautical | 1 |
| Navigation | 2 |
| Space | 20 |
| Technology | 7 |
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