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双 同轴 : 23 phrases in 10 subjects |
| Agriculture | 1 |
| Aviation | 1 |
| Electric machinery | 3 |
| Electronics | 3 |
| General | 1 |
| Information technology | 2 |
| Mechanics | 1 |
| Multimedia | 1 |
| Technology | 6 |
| Telecommunications | 4 |
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