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单工 制 : 29 phrases in 12 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Aviation | 4 |
| Business | 2 |
| Economy | 2 |
| Electronics | 3 |
| Finances | 1 |
| Information technology | 1 |
| Oil / petroleum | 1 |
| Rail transport | 3 |
| Securities | 1 |
| Technology | 9 |
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