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下降压力 : 26 phrases in 12 subjects |
| Aviation | 4 |
| Drilling | 2 |
| Electronics | 1 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Metallurgy | 1 |
| Mining | 1 |
| Oil / petroleum | 2 |
| Oil and gas | 1 |
| Refrigeration | 2 |
| Technology | 9 |
| Wind Energy | 1 |
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