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实施设计 : 15 phrases in 10 subjects |
| Bridge construction | 1 |
| Economy | 1 |
| Electronics | 3 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Hydroelectric power stations | 1 |
| Plastics | 1 |
| Rail transport | 2 |
| Space | 1 |
| Technology | 2 |
| United Nations | 1 |
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