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By certification 
4-68 type centrifugal fan suitable for factories and large buildings in general indoor ventilation, both can be used as the input gas, also used as the output of gas, harmless, non-corrosive steel material gas.
Flow: 565 ~ 239655m? / H
Total pressure: 215 ~ 3863pa
Machine No.: 2.8 ~ 20B were 14
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