... bag sealing machine applys to packaging materials,telephone sets, ect weld width from 1mm to 200mm 18m/min ultrasonic shop bag sealing machine1 ... ,Christmas ornaments and other products2. ultrasonic lace stitching machine is available in straight line, curve,edge, welding and other functions , weld width ... has imported transducers and strong sound wave. Ultrasonic shop bag sealing machine.