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| optic tapoff | |||
| optical tapoff | |||
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光分接 : 44 phrases in 11 subjects |
| Air defense | 1 |
| Computer networks | 2 |
| Ecology | 2 |
| Electronics | 21 |
| General | 1 |
| Geophysics | 1 |
| Information technology | 3 |
| Multimedia | 1 |
| Space | 2 |
| Technology | 7 |
| Water resources | 3 |
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