Plies of high strength synthetic cord, embedded steel wirehelix, copper wires (upon demand).
高强度多层合成纤维，植入螺旋型金属钢线(按用户要求提供铜导线)。
2
Wire forms are springs in every sense of the word, but they are distinguished from other types of springs in that they typically do not have a helix or coil configuration to them.