Chain-lock spring machine

The product of the spring machine is of one steel wire one-time shaping chain structure, with the advantages of even bearing capacity, rational, jointless, fracture-free, sink-free structure and high elasticity. Its fatigue strength, yield limit is unparalleld, and it is designed based on body weight distribution and backbone positions. It combines the functions of body protection, waist protection and health caring, reputed as "comfortable sleeping spring".