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最 低 压力 : 10 phrases in 8 subjects |
| Drilling | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Geophysics | 1 |
| Hydroelectric power stations | 2 |
| Mining | 2 |
| Oil processing plants | 1 |
| Steel production | 1 |
| Technology | 1 |
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