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| 光学自动跟踪; 光学自动导航 | |||
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| 光学自动跟踪; 光学自动导航 | |||
| optical homing: 20 phrases in 5 subjects |
| Air defense | 2 |
| Aviation | 2 |
| Electronics | 3 |
| Space | 6 |
| Technology | 7 |
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