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| 视觉检査 | |||
| 瞄准具操纵装置 | |||
| 目测检验 | |||
| 直〔目〕视控制; 目视检査; 观测检验 | |||
| 目视检查; 直观控制 | |||
| 目视控制 | |||
| 直视控制; 观察检验 | |||
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sight control : 11 phrases in 4 subjects |
| Air defense | 1 |
| Aviation | 5 |
| Electronics | 3 |
| Space | 2 |
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