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跟踪与数据中继
| 卫星
| 跟踪与数据中继 | |
| el. | tracking and data relay |
| GPS 卫星 | |
| space | GPS satellites |
| N 卫星 | |
| space | N-SAT |
| 卫星 | |
| environ. | satellite |
| rem.sens. | satellite |
| space | megabirds; satellites, balloons and rockets; moon; major planetary satellite |
| 卫星 DNA | |
| life.sc. | satellite DNA |
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| tracking and data relay | |||
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跟踪与数据中继 : 15 phrases in 5 subjects |
| Aviation | 4 |
| Earth sciences | 2 |
| Electronics | 3 |
| Space | 3 |
| United States | 3 |
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