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加强 料 : 27 phrases in 9 subjects |
| Architecture | 1 |
| Aviation | 1 |
| Electronics | 1 |
| Metallurgy | 3 |
| Plastics | 3 |
| Shipbuilding | 1 |
| Space | 2 |
| Technology | 9 |
| Wind Energy | 6 |
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