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| tracking in Doppler | |||
| Doppler tracking | |||
| 多普勒 跟 踪: 25 phrases in 7 subjects |
| Air defense | 2 |
| Astronautics | 1 |
| Aviation | 4 |
| Earth sciences | 1 |
| Electronics | 6 |
| Space | 8 |
| Technology | 3 |
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