... briefcases,handbags,stationery. High-frequency shoes upper welding and cutting machine:Dongguan South Nekon Ultrasonic Machinery Co., LTD ... preceded to popularize ultrasonic beads hot-fix machine in 2003, and the beads installation acquired national patents in ... years later, Nekon produced ultrasonic numerically controlled punching machine, and the rotary punch pin installation also acquired national ...