- Dong Ha Precision Co., Ltd
- Address:18-6,Samjeong-dong ,Ojeong-gu, Bucheon-si
- chansol co ,.ltd
- Address:469-4, Kaehyang-Ri, Jeungnam-Myun
- Infirus Co. , Ltd.
- Address:2513. , Intellige C., 24 Jungja-Dong, Bundang-Gu
- DK Corporation
- Address:409, Rojin Plaza, 775-3, Gojan-dong, Danwon-gu
- Yeonho Electronics Co., Ltd.
- Address:506-2 Hanam-dong,Hanam-dong ,Gwangsan-gu