The boundaries of large, medium and small cooling towers are divided according to the following regulations: 1. Large: the cooling water volume of a single cell is not less than 3000m3/h. 2. Medium size: the cooling water volume per cell is less than 3000m3/h and not less than 1000m3/h. 3. Small: the cooling water volume of a single cell is less than 1000m3/h. Lingyan is a manufacturer of cooling towers and square cooling towers, with complete models, excellent performance and low price. If necessary, please call at any time. Shandong Kehua Intelligent Equipment Co.,Ltd. has created a professional team which contained with a numbers of engineers and technology experts. Serving others for customers a better life with induction heating system for employees respect and opportunity. To strengthen and grow our leadership position by providing induction heating system across a range of market segments, including high frequency induction heating machine, and high-performance servers.