Long-sung ultrasound was registered in beijing in 2004, and after more than a decade of development, the company's development required the establishment of a long-sung automation equipment (coachry) limited liability company in hebei by 2020, specialized in the production, development and sale of a single ultrasonic welder, a plastic welder, an ultrasonic head, an ultrasonic assembly, a plastic heater, a smelting machine, a heater, a hot welder, an ultrasonic edger, a tablet heater, a vibrating welder, etc