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工程 改建 : 51 phrases in 14 subjects |
| Aviation | 17 |
| Bridge construction | 1 |
| Business | 6 |
| Commerce | 1 |
| Consulting | 1 |
| Desert science | 1 |
| Ecology | 1 |
| Economy | 2 |
| Electronics | 2 |
| Finances | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 15 |
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