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双断路 : 21 phrases in 9 subjects |
| Automobiles | 2 |
| Communications | 1 |
| Electronics | 5 |
| Hydroelectric power stations | 1 |
| Metallurgy | 2 |
| Rail transport | 2 |
| Space | 1 |
| Technology | 6 |
| Telecommunications | 1 |
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