... sewing module Fast welding speed, high strength, nice welding seam, good sealing,low energy consumption and Ultrasonic seamless sewing module (machineThe ... ultrasonic seamless sewing has much advantages: Fast welding speed, high strength, nice welding seam, good sealing,low energy consumption ... no need the needle and thread, what’s more, high strength in sewing and welding, good sealing. Thus it ...