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| economic design | |||
| economic study | |||
| 经济设计: 18 phrases in 9 subjects |
| Aviation | 2 |
| Bridge construction | 2 |
| Economy | 1 |
| Electronics | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Oil / petroleum | 1 |
| Project management | 1 |
| Technology | 8 |
| Water resources | 1 |
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