Duo Li Duo has more than 10 years of cooling fan design experience of senior engineers, with many years of research and development experience and a full understanding of customer applications, the market, the design of the most in line with customer needs of the product, so that customers can get better results, lower noise and power consumption. Have a strong pre-sales and after-sales service team, can cooperate in customer product development stage or improvement and optimization project development or provide corresponding improvement and optimization suggestions; Can carry out technical exchanges with customers at any time, understand the real needs of customers and development trends, industry trends; Help customers to do the corresponding technical training; Can respond to customer needs in the shortest time and the fastest speed. Full range of products, more than 60 sizes, more than 200 series of fans; According to the market situation and customer demand tendency, collect relevant information and carry out forward-looking development; Expand the product performance advantage and product range with more than 5 new products per month.