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| 重气体: 28 phrases in 11 subjects |
| Aviation | 2 |
| Electronics | 2 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Metallurgy | 4 |
| Military | 1 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Refrigeration | 1 |
| Technology | 13 |
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