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双路通路 : 21 phrases in 9 subjects |
| Construction | 1 |
| Electric machinery | 1 |
| Electronics | 5 |
| General | 1 |
| Information technology | 2 |
| Metallurgy | 1 |
| Shipbuilding | 1 |
| Technology | 8 |
| Telecommunications | 1 |
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