(1)shoot cover using the import electrification aluminum or the stainless steel,and pevent oxidizing and discoloring. (2)component adopts high-quality cold rolled steel,prastic spurted by static eleticity and resist corrosion. (3)skewing-Chassis design can match different keel structure. (4)reasonable designing the refraction curve and gentle light can effectively protect eyes. (5)Novel design model,artistic semblance,and with high effect output.