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| 气体反应: 36 phrases in 12 subjects |
| Automobiles | 1 |
| Business | 2 |
| Electronics | 5 |
| Explosives and Explosive Ordnance Disposal | 2 |
| General | 2 |
| Life sciences | 1 |
| Metallurgy | 8 |
| Nuclear physics | 2 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Technology | 10 |
| Water resources | 1 |
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