... YP-D45 28Khz Ultrasonic Hand-held Plastic Welding Machine Used in spot welding,pressure welding,riveting,marking, ... machines, handheld ultrasonic welding machines, hand-held welding machine, portable welding machine, ultrasonic spot welding, riveting machines, ultrasonic point welder ... , gymnastics mats, boxing gloves, boxing sandbag Sanda protective gear, the path to indicate the brand, the X Display ...