... 3,The quality have guarantee. The features of the machine: (ultrasonic welding machine nonwoven)1,Big power,using four balance ... , car dashboard,lights,mirrors, sun visor, interior parts, filters, reflective material, reflective spike,bumper, cable,motorcycle plastic filter ... as welding the plastic cup : Principle of Ultrasonic Welding:(ultrasonic welding machine nonwoven) The basic principle is to ...