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通道-通道连接 : 35 phrases in 9 subjects |
| Air defense | 2 |
| Automobiles | 1 |
| Electronics | 8 |
| General | 1 |
| Information technology | 9 |
| Metallurgy | 2 |
| Rail transport | 1 |
| Space | 3 |
| Technology | 8 |
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