... YP-D45 28Khz Ultrasonic Hand-held Plastic Welding Machine Used in spot welding,pressure welding,riveting, ... , handheld ultrasonic welding machines, hand-held welding machine, portable welding machine, ultrasonic spot welding, riveting machines, ultrasonic point ... tennis rackets, golf clubs, pool table, treadmill roller rope skipping handle stepper, treadmill accessories, box jumps, gymnastics mats ...