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| 地球轨道卫星 | |||
| 地球观测卫星 | |||
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| 地球轨道卫星 | |||
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earth-orbiting satellite : 20 phrases in 8 subjects |
| Air defense | 1 |
| Earth sciences | 6 |
| Electronics | 2 |
| Geophysics | 1 |
| Oil / petroleum | 1 |
| Space | 7 |
| Technology | 1 |
| United States | 1 |
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