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本文提出J型风帽的设计。认为如采用此风帽,每个排风系统可省去约5m 风管,并减少一定比例的风机电耗。
This article proposes the design of a J-shaped hood. It is believed that if this hood is used, each exhaust system can save about 5m ducts and reduce a certain percentage of fan power consumption.