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分布 光纤 : 39 phrases in 10 subjects |
| Air defense | 1 |
| Animal husbandry | 1 |
| Computer networks | 4 |
| Electronics | 14 |
| Geophysics | 1 |
| Hydroelectric power stations | 1 |
| Information technology | 6 |
| Multimedia | 1 |
| Technology | 5 |
| Telecommunications | 5 |
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