- Hanwoo Corporation
- Address:159, Samsung-Dong, Kangnam-Ku
- A-MECS CORP
- Address:#307 woosunglivingtel ,27 Eonjuro30Gil, Gangnamgu
- HANSEO PRECISION INDUSTRY CO., LTD.
- Address:219-1 Dongam-ri Eumbong-myeon
- HANDA
- Address:110-10, Junggey-ro 4 gil, Nowon-gu
- Steel Corea Co., Ltd.
- Address:D-1710, Smart Valley, 30 Songdomirae-ro, Yeonsu-gu
- Woojin Mechanism
- Address:567-15, Sangdong, Wonmigu,
- BA KOREA
- Address:388-7, sinin-dong,
- SEOWON Co., Ltd. (GOLDEN TREE)
- Address:17,Bucheonro 198-gil, Wonmi-Gu
- DS HEAVY PARTS CO., LTD.
- Address:Youngdeungpo-Dong
- MANSANG CORPORATION
- Address:No.704, Shinsungmisocity 2, 592. Sannam-dong