poultry farm fan 1,Large air flow , 2,Low noise 3,Low energy consumption 4,Long service life poultry farm fan1,Large air flow ,2,Low noise 3,Low energy consumption 4,Long service lifepoultry house fanThe fan blade is stainless steel , big air volume, without distortion, no broken, attractive and durable. (adopting aluminum fan blade in the past, which had some problems caused after long time ...