- Korea Engineering System Co., Ltd.
- Address:Boonchon-Ri, 247, Bongdam-Eup, Suwon, Korea
- Jin Yang Oil Seal Industy.Co
- Address:#404-11 Cheongcheon2-Dong,Cheongcheon 2-dong ,Bupyeong-gu
- Lead precision
- Address:Janglim
- Yu Seong E.M Corporation
- Address:16-8 Seong-su 1ka 2-dong,Seongsu 1-ga 2-dong ,Seongdong-gu
- Samjoo Eng. Co.,Ltd.
- Address:1508-3,Dadae-dong ,Saha-gu
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