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| expansion of air | |||
| expansion of gases | |||
| gas amplification | |||
| gas expansion | |||
| air expansion | |||
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气 体膨胀 : 21 phrases in 9 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 4 |
| Metallurgy | 1 |
| Mining | 2 |
| Oil / petroleum | 4 |
| Refrigeration | 2 |
| Technology | 5 |
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