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| 风机吸风; 风机吸人口负压 | |||
| fan draft: 56 phrases in 14 subjects |
| Architecture | 2 |
| Automobiles | 6 |
| Chemistry | 3 |
| Compressors | 3 |
| Electric machinery | 1 |
| Electronics | 2 |
| General | 3 |
| Metallurgy | 3 |
| Nautical | 3 |
| Oil / petroleum | 4 |
| Oil processing plants | 1 |
| Refrigeration | 3 |
| Technology | 21 |
| Wind Energy | 1 |
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