industrial fan,strong wind, 1.3 knife shape blades, 2.180 degree oscillation. industrial stand fan 1.3 knife shape blades2.180 degree oscillation3.strong wind4.Optimized aluminum-iron blade structure,two or three blades5.Streaming blade design,low noise with soft wind6.Suitable for home,office,hotel,store,hall and so on7.Novel outlook,classic and excellent crafwork