Zhengzhou DEAO Science & Technology Co., Ltd is specialized in research, production and sales of screen changer/melt filter. Base on the deep technology accumulation and invention patents, DEAO is standing on the top position of screen changer industry and has been supplying the high efficiency and cost-saving solutions of filtration for totally more than 1000 customers Innovative technology comes from professional dedication and accumulation, DEAO professional R & D team has been focused on researching non-stop screen changer/melt filter from the ....... With a number of experienced and capable technical workers, advanced technology, innovative products, superior product equipments, and self-contained QC system, Zhengzhou DEAO Science & Technology Co., Ltd are planted firmly in the principles of quality and customer service. Our mission is delivering the highest standard of product and the best service in the weighing industry.