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气压区 : 18 phrases in 9 subjects |
| Agriculture | 2 |
| Automobiles | 1 |
| Aviation | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 2 |
| Oil / petroleum | 1 |
| Refrigeration | 3 |
| Skydiving | 1 |
| Technology | 6 |
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