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| |||
| 光学轴线 | |||
| 光轴 | |||
| 天线 | |||
| 视轴 | |||
| |||
| 视轴 (从瞳孔中央至视网膜中央凹的连线，与视线方向一致。视轴与眼轴呈锐角交叉) | |||
| 光学轴线 | |||
| 光轴; 视轴 | |||
| |||
| 主光轴 | |||
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optical axis : 43 phrases in 6 subjects |
| Aviation | 1 |
| Electronics | 5 |
| Metallurgy | 3 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 32 |
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