Metal spring, Xu-feng Hardware Factory (certified), the spring is 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 stampings business profiled spring, the factory has advanced technology and equipment, modern workshops and professional personnel, products sold around the world. Problem type: both ends of the spring issue of the instantaneous spring force if other objects or constraints spring, when it is deformed, can not stretch to a value of zero or mutation by mutation to a value of zero. Spring will not be mutated by changing the spring deformation to gradual decision. 2, the spring balance problems such practice often single problem, usually Hooke's law F = Kx and equilibrium conditions to solve the tension spring, when the selection of the study note that the column equation, note the use of the whole law and the isolation method . Dongguan Xu-feng Hardware Spring Factory is a professional production of metal springs, lathe parts and stamping parts of the enterprise, with Japan imported computer universal spring machine, computer spring machine, extension spring, torsion spring machines, CNC lathes, grinders size presses and other machines more than 120 sets of precision, a large South Korean KOS, KIS, Daxin, Japan, fine lines, Suzuki stainless steel wire (SUS301, SUS302, SUS304, SUS316), piano wire (SWPA, SPWB), spring steel wire ( SWC, 65MN, 60Si2MnA), copper materials and other imported materials, and has a dynamometer, projectors, grinding machine, shot blasting machine, salt spray test machine detector. Dongguan Xu-feng metal spring metal products factory springs, lathe parts and stampings are widely used in electronics, electrical appliances, automobiles, machinery, toys, jewelry, and other industries. The company of "honesty, quality and cheap, efficient service, innovation and development, mutual benefit and win-win; meet customer needs is our eternal pursuit of" business philosophy, to meet your needs. Quality products, good reputation, first-class services to meet your needs, welcome colleagues from home and abroad to negotiate business.