Shrapnel manufacturers _ Xufeng Hardware Factory (certified) _ shrapnel provided by Dongguan City, Xu-feng Hardware Products Factory. Dongguan City, Xu-feng Hardware Products Factory (www.dglijing168.com) is specialized in the "spring-like, lathe category, stamping class, spring, torsion spring, retainer, battery spring, shaped bomb" of the enterprise, the company receives "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Miss Liu. Dongguan City, Xu-feng Hardware Products Factory is a professional manufacturer of metal springs, lathe parts and stamping parts of the enterprise, the factory has advanced technology and equipment, modern workshops and professional personnel, products sold around the world. Production technology requirements of spring leaf: 2. notch or hole portion stress concentration. Spring pieces often have stepped portions and openings, dramatic changes in the size of the ladder at the stress concentration. The smaller the diameter of the hole plate width is larger, the greater the stress concentration factor. The Company in good faith, efficient, flexible metal shrapnel known, service to customers in different industries. Dongguan City, Xu-feng Hardware Products Factory is a professional manufacturer of metal springs, lathe parts and stamping parts of the spring plate production factory, the factory has advanced technology and equipment, modern factories and professionals shrapnel manufacturers, selling products around the world. Xufeng Hardware Products Factory Main business: stainless steel sheet, tape, and other products. As a business enterprise, we always uphold the integrity and to help customers, persist in using their services to impress customers. If some friends are welcome to visit our company and guide our work, if you are interested in our products, you can also directly submit online purchase information, we will promptly contact you! We look forward to work with you to create a win-win situation, create brilliant.