... ultrasonic lace machine, ultrasonic sewing machine, ultrasonic embossing machine, ultrasonic embroidery machine, ultrasonic trimming machine, ultrasonic compound machine, ultrasonic stitching machine, ultrasonic heat sealing machine, ultrasonic Velcro ... advantages of South Nekon ultrasonic lace sewing machine compared with traditional thread sewing machine:1. Ultrasonic welding, without needles and ...