Qingdao Restong Automation Equipment co., LTD. Is a high-tech enterprise integrating research and development, production, sales and service. Since its establishment, the company has been dedicated to the limit control and measurement solutions of materials and liquid levels in process automation. With active innovation and research and development, relying on advanced domestic and foreign technology and professional personnel, and coupled with rigorous management for customers to improve the variety, functional diversity of products.    The company has a special product research and development center, with many unive...