DWT-I type axial flow roof fan air volume is large, pressure is low than centrifugal fan, according to user needs can be designed as a two-way rotating reversible type. DWT-I type axial flow roof fan air volume is large, pressure is low than centrifugal fan, according to user needs can be designed as a two-way rotating reversible type. Fan kënë anɔŋ noise low, light weight, smooth operation, high efficiency, and good corrosion resistance. A lëu bï ya luui në ɣän ke petrol, chemical, textile, metallurgy, ku jɔl ya ɣän ke ɣän ke ɣɔɔc.