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| 经济合理的设计 | |||
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| 经济设计 | |||
| 实用设计; 经济结构 | |||
| economical design: 9 phrases in 6 subjects |
| Aviation | 2 |
| Bridge construction | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Project management | 1 |
| Technology | 2 |
| Water resources | 1 |
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