- Sungho Boiler Co., LTD
- Address:134 Sosabon-dong, Sosa-gu
- Semisosa Co., Ltd.
- Address:Daewha
- Namyang Engineering & Energy Co.ltd
- Address:Suite Da-4402, 1258 Kuro-Dong
- DongYang Easy-Tech co., ltd.
- Address:# 223-672, Seoknam-Dong, Seo-Gu
- DSM CO., LTD.
- Address:Sirok Dong
- Trazone
- Address:733 Haengsin-Dong
- Bonny International Corp.
- Address:FL 5, SAMYOUNG B/D, 84-1,Jungang-dong 4-ga ,Jung-gu
- GEYSERENTEC CO LTD
- Address:771-7 Majang-dong
- Boosung Geyser Co.,Ltd.
- Address:771-7,Majang-dong ,Seongdong-gu
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