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| 光学跟踪器; 光学跟踪仪 | |||
| 光学跟踪装置 | |||
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| 光学跟踪装置 | |||
| optical tracker: 37 phrases in 6 subjects |
| Aviation | 9 |
| Electronics | 10 |
| Missiles | 1 |
| Space | 9 |
| Technology | 6 |
| United States | 2 |
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