Dalian spring was founded in 1958. It is the executive director of China Machinery General Parts Industry Association & vice president of Spring Professional Association. As a specialized manufacturer of hot coil spring with over 60 years' experience, we have become the main backbone enterprise in the field of producing large-scale hot coil spring in both domestic and overseas markets. We have a strong capability of technology development and organize to participate in a number of international, national, industry standards. As the National high-tech enterprise, Liaoning provincial enterprise technology center & Dalian high performance spring application engineering laboratory, we have obtained 2 invention patents & 36 utility model patents. We have passed the quality management system GB/T 19001-2008/ISO 9001:2008, the occupational health and safety management system GB/T 2801-2001, the environmental management system GB/T 24001-2004 certification and international railway industry standard system IRIS certification.