- gunyang trunet
- Address:Sasang Gu
- Dok muffle furnace company
- Address:Sangdaewon-Dong
- Chunji Corporation
- Address:233-1, Eunbong-ri, Kanam-myeon,
- TAEKWANG TECH
- Address:Oya-ri, Cheonbuk-myeon
- PMS co
- Address:14-203, BISM, 578, Kwaebop-dong, Sasang-ku
- Dae Heung Machinery Co., Ltd.
- Address:# 320-2, Sayang-Ri, Moonbek-Myum,
- Beeline Corporation
- Address:Sasang P. O. Box39
- Sewha Corp.
- Address:5f. , Songjeon Bldg. 52 Samsungdong, Kangnamku
- Mirae Tech Inc.
- Address:1162-17, Sinnam-Dong
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