Changzhou Wujin Dongnan Machinery & Electrical Appliance Co.,Ltd is a leading company in manufacturing Ultrasonic machine. Founded in 1994, Changzhou Wujin Dongnan machinery & electrical appliance co.,ltd. has more than two decade of experience in the design, research and manufacturing of ultrasonic machine,hot air seam sealing machine in strict compliance with ISO and CE standards. Our machine including : Ultrasonic Lace Sewing Machine,Ultrasonic Quilting Machine, Ultrasonic Sealing Machine, Ul