... a solid surface YP-D45 28Khz Ultrasonic Hand-held Plastic Welding Machine Used in spot welding,pressure welding, ... industry, communications equipment and other industries. Toy industry plastic toys, water guns, aquatic life video game, children dolls ... rackets, tennis rackets, golf clubs, pool table, treadmill roller rope skipping handle stepper, treadmill accessories, box jumps, gymnastics mats, ...