Established in 1973, HyopChin Industrial Co., Ltd. developed movement parts of wristwatch at first in the nation and exported them to the Japan. Based upon the accumulated technology since then it has developed and supplied defense products like advanced fuzes and sensors to the Korean government and its allies. The company also is a specialized manufacturer in commercial lines such as sensors for navigation system, special mould, Nuclear fuel Assembly (WH-type Top&Bottom nozzle assembly), and various precision metal parts for specific customer applications.