- Dong Seong Company
- Address:#606, Daewoo Maejong Bldg, 750-1, Chang-Hang-Dong, Ilsan-Dong-Gu, Goyang-Si, Gyeonggi-Do, Korea
- i-gene enterprise
- Address:1407 Samsung Anytel, 837-17 yeoksam-dong
- DongLim co.ltd
- Address:songpagu seongchondong 239-23
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