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引 形的 : 12 phrases in 9 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Bridge construction | 1 |
| Construction | 1 |
| Electronics | 2 |
| International trade | 1 |
| Metallurgy | 2 |
| Shipbuilding | 1 |
| Technology | 2 |
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