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堵水 塞 : 57 phrases in 11 subjects |
| Automobiles | 1 |
| Desert science | 1 |
| Drilling | 4 |
| Electronics | 1 |
| Engineering geology | 2 |
| Explosives and Explosive Ordnance Disposal | 4 |
| Metallurgy | 27 |
| Navigation | 1 |
| Oil / petroleum | 6 |
| Technology | 8 |
| Water resources | 2 |
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