... ,centrifugal ventilatorIntroduction of centrifugal ventilator,centrifugal fan,fan,ventilator, blower,air blower,exhaust fan,ventilation fanFRP is a new-type ... divided to dextrorotation and levoduction two kinds.From one electrical machinery end to look, we call dextrorotation ventilator ... or not and check the rotatory direction of the electrical machinery , prevent the impeller from overturning.6. when ...