Shandong Jining Qingfeng Machinery Hardware Co. Ltd. Chinese Machine ToolAssociation member units,Website:http://www.qfmh-tools.com,production of spring chuck’s professional factory , known as machine tool accessory manufacturing experts. The fixed assets of 10million yuan,with CNC Lathes,CNC milling machines,machining centers,high-precision grinding,cylindrical griding, etc.more than 180 sets of advanced equipment.Self-development, Production of collets,milling chuck,quick change chuck ,tapping chucks,machine tool accessories and other top-selling across the country To, and exported...