- Yokogawa Measuring instruments Korea Corporation
- Address:
- autosys
- Address:1001-002, it castle 1dong, 550-1,
- POWER21
- Address:609, hanshin S-MECA, 1359 Guanpyeong-dong, Yuseong-gu, Daejeon, Korea
- Otochem Co.,Ltd.
- Address:Yeongdeungpo-dong 7-ga ,Yeongdeungpo-gu
- Korea Noble Gas Co.
- Address:96 Sinil-dong,Sinil-dong ,Daedeok-gu
- Marktech Trading Co.,Ltd.
- Address:395-8,Yangjae-dong ,Seocho-gu
- Jongro Industrial Co.,Ltd
- Address:
- ELT SENSOR Corp.
- Address:(Chunui Technopark 101-909)36, Bucheon-ro 198beon-gil, Wonmi-gu,
- Korea Mediplan Co., Ltd.
- Address:LG Eclat 645 - Ho,251-3 Seohyeon-Dong Bundang-Gu
- Q-Tec Electronic Co
- Address:274-22,Daeya-dong ,Siheung-si
- Hwa Jin Enterprise Co.,Ltd
- Address:1573-10,Songjeong-dong ,Gangseo-gu
- SCIENTEC LAB CENTER CO LTD
- Address:suite no. B121, hanshin s-meca, kwanpyoung-dong
- NANOENTEK INC
- Address:12F Ace High-End Tower 235-2, Guro3-dong, Guro-gu, Seoul, 152-740
- DAWOO ENGINEERING CO LTD
- Address:127-3 Wolmunri Wabueup,
- Venture T&I
- Address:Daechon-dong
- SEJU ENGINEERING CO LTD
- Address:611-1, Guam-dong, Yuseong-gu,
- SV CORP.
- Address:719-1. I-dong, Sangnok-gu
- KINSCO Technology Co.,ltd
- Address:46-20 Suyu 5 Dong Kangbuk Gu
- Hanna-Mccoy Corporation
- Address:55,Ikseon-dong ,Jongno-gu
- SurfaceTech
- Address:No. 307 Starwood Bd. , 5439-1 Sangdaewon-Dong