- Jinyung Engineering Co., Ltd.
- Address:342-1,Sucheong-dong ,Osan-si
- MyungSung Hyoda Instruments Corp
- Address:405-ho, 304-Dong, Bucheon Techno Park, 365 Samjeong-dong, Ojeong-gu
- GLOBAL ENGINEERING CO., LTD
- Address:maesanro 29 joeun plaza building
- Zeus Co., Ltd.
- Address:164-1,Busan-dong ,Osan-si
- Yamatake Korea Co.,Ltd
- Address:19f, Korea Teachers Pension Bldg., Yeouido-dong, Yeongdeungpo-gu