- Dooson Inc.
- Address:1F. 67-30,Guui-dong ,Gwangjin-gu
- Youngshin Metal
- Address:1206-11 Shinsangri Jinliangeup
- Oriental Material
- Address:Songpadong 86-22 201
- G3TRANS
- Address:Byulyang
- The 21St Century Silica Ltd.
- Address:429-5,Bangok-ri,Sanyang-myeon ,Mungyeong-si
- Jangam Energy
- Address:312-1 Gasan-ri Gasan-Myeon
- Solmics Co.,Ltd.
- Address:624,Jangdang-dong ,Pyeongtaek-si
- Dawoo Sealant Industrial Co., Ltd.
- Address:505-3,Gasan-dong ,Geumcheon-gu
- Han Young Materials Co., Ltd.
- Address:
- SAC Corporation
- Address:384 daejong-ri, Onsan-eup, Ulju-gun
- DONGNAM GLOBAL
- Address:
- Sunsystems Co,.Ltd
- Address:811 2 Bangbae Dong Seocho Gu
- Js Steel
- Address:13f Landmark Tower 837-36
- Ki Rim Semitech Co.,Ltd.
- Address:
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