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控制带宽 : 20 phrases in 10 subjects |
| Automobiles | 1 |
| Aviation | 2 |
| Computer networks | 3 |
| Electronics | 5 |
| Geophysics | 2 |
| Information technology | 1 |
| Shipbuilding | 1 |
| Space | 3 |
| Technology | 1 |
| Telecommunications | 1 |
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