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同架 : 21 phrases in 11 subjects |
| Air defense | 1 |
| Business | 1 |
| Corporate governance | 2 |
| Earth sciences | 1 |
| General | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Rail transport | 2 |
| Technology | 7 |
| Telecommunications | 1 |
| United Nations | 3 |
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