? Liaocheng sun stainless steel Co., Ltd. is currently the only company specializing in the production of roof ventilation equipment manufacturers. In recent years, the joint efforts of engineers and technicians, the factory produced electricity --- the roof ventilator-free is the specification currently the largest and most complete one of the manufacturers, of which 300, 360, 450 is mainly used in residential buildings, villas floor roof ventilation mouth, 500, 600, 680 is mainly used for large-scale factory workshop and use exhaust ventilation in public places. All stainless steel body, cast aluminum supports a special double-sealed bearings. Product sales over the surface of the country, first class service. Windmill - wind pumps are not fuel, not electricity, manufacture of fine, wind speed 1.67 m / s, that is able to start. Blade diameter 5-10 m high tower, nine specifications can be designed and manufactured according to different needs. Colorful benchmark widely used in parks, green belt side, the villa and the production environment, it can indicate not only the level of wind direction and speed of your environment can also add a dynamic and harmonious. Face strong competition in the market, we always adhere to the manufacture of quality products for the guidelines, adhere to integrity, excellent customer service with the greatest satisfaction!