Domestic currently well-known truck crane manufacturers are: Zoomlion, Sany Heavy Industry, Xugong, Liugong, Dongyue, the Yangtze River and many other enterprises, equipment weight 8-500 tons, the general 6 * 19W + IWR, 6 * 29FI + IWR, 4V39S +5 FC, 35W * 7 and other wire rope, with the improvement of equipment performance, many now use the rope with K, "K" on behalf of wire rope forging. Forged after the wire rope and the same diameter tension increased by 20% or more. In the steel wire rope has not been forged than the life expectancy of more than 30%. With wear-resistant, resistant to extrusion characteristics.