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| 跟踪和数据采集系统 | |||
| 跟踪与数据采集系统 | |||
| 跟踪和数据获取系统 | |||
| 跟踪和数据获得系统 | |||
| tracking and data acquisition system: 7 phrases in 4 subjects |
| Air defense | 1 |
| Earth sciences | 1 |
| Electronics | 3 |
| Space | 2 |
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