- SRTechnology Corp.
- Address:610 Byoksan Digital Valley III, 212-13 Guro-dong
- JS Cable
- Address:5f, Bently Bldg. , 106-2, Yangjaedong, Kangnam-Gu
- KyungAn Cable Co.,Ltd
- Address:KyungAn Building# 769-12
- Daebo Systems Corp.
- Address:340~361bunji, Yatap-dong, Bundang-gu
- Samwoo Universal Co., Ltd.
- Address:B-149, 50, Joongang-ro, 3-gil, Guro-gu,
- First Myung Jin Engineering Co.
- Address:2-3 Hasung-ri Hasung-myun
- CHUNGWOO SE CO LTD
- Address:258-2 Simokeucheon-Ro, Hyeondo-Myeon,