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孔堵塞 : 34 phrases in 8 subjects |
| Architecture | 1 |
| Drilling | 2 |
| Electronics | 2 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 5 |
| Metallurgy | 9 |
| Oil / petroleum | 2 |
| Technology | 12 |
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