Ultrasonic lace sewing machine Used in welding,cutting,lace making,sewing cloth,bags,packing products,non-woven material,etc. HY-2020 Ultrasonic Lace Sewing MachineAvailable ... in a straight line, curve, edge, welding and other functions. weld width from 1mm to 125mm. Can be used for ... max speed:0.22m/minThe welding width:100mm Ultrasonic Lace Sewing Machine