... , greenhouse, factory workshop, textile, chemical, medicine, tea, vegetable storage, and supermarketDJF-C series Cone exhaust fansReasonable cone designing, low noise, big air ... (c)-1220110046014003800073≤7075038012201220450DJF(c)-1250125043914004400080≤70110038013801380450 Sanhe DJF-C series Cone poultry exhaust fans 40" CE and CCC certificate ISO 9001 Certificate