Supply proof wall exhaust fan devaluation giant Shanghai amount. Supply explosion-proof ventilation equipment, the amount of giant explosion-proof wall-type row fan, the supply explosion-proof ventilation equipment, the amount of giant explosion-proof wall-row fan, supply explosion proof ventilation equipment, the amount of giant explosion-proof wall-style row fan CBF-Series explosion-proof wall-row fan (Ⅱ B) the applicable range Zone 1 and Zone 2 hazardous locations. 2, Ⅱ A, Ⅱ B class for explosive gas atmospheres. Product Features 1, explosion-proof exhaust fan motor, blades and other components. 2, beautiful shape, mounting bracket with integrated, safe and reliable. 3, with a damping device, low noise operation. 4 steelpipe.