- National Trading And Telelcomunication Co., Ltd.
- Address:136-2,Gaebong-dong ,Guro-gu
- Latchwon Co., Ltd.
- Address:975-94,Jangnim-dong ,Saha-gu
- Sangbo Electronics Co., Ltd.
- Address:466,Uijeon-ri ,Jinyeong-eup ,Gimhae-si
- Dae Ryung Electronics Co., Ltd. Buchun Branch
- Address:101-701,Bucheon Techno Park, 364, Samjeong-dong ,Ojeong-gu, Bucheon-si
- SHIN HEUNG PRECISION INDUSTRY CO., LTD.
- Address:252 Bongnim-ri, Saengnim-myeon, Gimhae, Gyeongnam, Korea
- Dse Inc.
- Address:Jangnim-dong ,Saha-gu
- SUNGHO CONTROL CO LTD
- Address:Cheongcheon-Dong
- EFControls Co.
- Address:86 Nokboen-dong, Eunpyung-gu
- Es Technology Co.,Ltd.
- Address:Wonji-ri,Wonji-ri ,Juchon-myeon ,Gimhae-si
- Yongsung Electric Co., Ltd.
- Address:348-3, Samri, Silchon-Myeon, Gwangju Si
- Samkwang Precision Co.,Ltd
- Address:508-1,Gamjeon-dong ,Sasang-gu
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