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| orbiting geophysical observatory | |||
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轨道 地球物理 观测 : 25 phrases in 8 subjects |
| Cartography | 2 |
| Earth sciences | 5 |
| Electronics | 4 |
| Geology | 1 |
| Geophysics | 2 |
| Military | 1 |
| Space | 7 |
| Technology | 3 |
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