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无 通 道 : 32 phrases in 14 subjects |
| Agriculture | 1 |
| Air defense | 1 |
| Architecture | 1 |
| Automobiles | 4 |
| Aviation | 1 |
| Communications | 3 |
| Electronics | 4 |
| General | 1 |
| Information technology | 3 |
| Project management | 1 |
| Rail transport | 1 |
| Space | 1 |
| Technology | 8 |
| Telecommunications | 2 |
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