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| 单位面积吸声能力; 吸收式调温机 | |||
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absorption unit : 28 phrases in 6 subjects |
| Automobiles | 2 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Hydroelectric power stations | 2 |
| Nautical | 2 |
| Refrigeration | 12 |
| Technology | 8 |
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