Supply proof oscillating fan devaluation Shanghai quantity Giant. Supply proof ventilation equipment, the amount of giant explosion proof shaking his head fan supply explosion-proof ventilation equipment, the amount of giant explosion proof shaking his head fan supply explosion-proof ventilation equipment, the amount of giant explosion proof shaking his head fan, the BFS-□ the FB Series Explosion-proof row fan (shaking his head) (Ⅱ B) Scope 1.1 District Zone 2 hazardous gas spaces; Ⅱ A and II B class T1 ~ T4 group explosive gas or vapor environment; product characteristics of the product by the explosion-proof motor, blades, network mask (column, bottom to sit, tripod) and shook his head institutions, etc. components; 2. Blade is made of cast aluminum alloy, to avoid friction produce sparks; 3. installed floor-to-ceiling and wall; 4. cabling.