Established in 2004, Chongqing Shengkuo Machinery Manufacturing Co., Ltd. is one of the largest auto and motorcycle part manufactories in West China. Specifically, the main products include all kinds of compression springs, extension springs, torsion springs, screw rods, metal spring covers and u-type wires. In 1980, our first factory was founded in Chongqing, and we began business by producing and selling auto and motor parts. In1999, in order to complement with its rapid business ...