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卫星跟踪 | |||
人卫跟踪 |
satellite tracking: 115 phrases in 14 subjects |
Air defense | 2 |
Aviation | 8 |
Business | 1 |
Cartography | 1 |
Communications | 1 |
Earth sciences | 3 |
Electronics | 14 |
General | 2 |
Geophysics | 3 |
Information technology | 1 |
Nautical | 1 |
Space | 54 |
Technology | 21 |
United States | 3 |