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镜光学 : 57 phrases in 9 subjects |
| Astronomy | 1 |
| Aviation | 1 |
| General | 11 |
| Medical | 4 |
| Metallurgy | 1 |
| Military | 7 |
| Nautical | 1 |
| Oil processing plants | 1 |
| Technology | 30 |
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