Features of dual-machine linked Numeric-control Press Brake Two WC67K series specification are choosen as main machine with double motor linkage synchron-device, which may work together to process overlong workpiece, or operate seperately to increase production efficiency. Defection compensation device is fitted, too.Mechanic and fluid servos with Mechanic slider are utilized in synchronous device. The stroke of upper slider and the position of rear apron are regulated quickly by machine and micro-regulated by hand with electronic NC display.