... fan impeller diameter has 14 kinds from 400-1400mm specifications,-A,-B,-C,-S types Oblique flow fan ... as to avoid the flow slope , to be a higher pressure coefficient. Oblique flow fan series DTXF ... improvement in order to produce advanced technology with a variety of models in all , to adapt ... fan impeller diameter has 14 kinds from 400-1400mm specifications,-A,-B,-C,-S four types, dozens of ...