... Japan piezoelectricity CMOs chip,stable output. 2) Special alloy steel material is used to make the knurl wheel,the welding head ... ,stable performance.5) By ultrasonic,will not damage the cloth material,non burr. 6) It is easy to change the knurl ... ,lace embossing,bronzing,binding,itemizing and etc. 3. Apply to: packing material,telephone sets,knitted products,sportwear,travel bag,bed sets,clothing ...