Double system has high position roller, high-performance sinker, dynamic stitch, motor control reserving carriage, also equipped with a take-down system, two sets of scissors and clips, digital technology, high-speed and efficient, to achieve pointelle, tuck, jacquard, intarsia, full needle jacquard, apparent shape, hidden shape, and other irregular patterns. suitable for wool, cashmere, cotton, chemical fiber, silk and all kinds of blended yarn, the production of sweaters, scarves, gloves, hats and knitted apparel accessories.