- Head Office, Siheung Factory: Hyemang Park street 255 Siheung-si, Gyeonggi-do, Korea. Tel : +82-31-499-6622
- Danjin Factory: Bongso-ri 45-5 Soonsung-myunDanggin-si Chungnam, Korea. Tel : +82-41-353-3071
- Daegu Factory: Wallhyang Nongongdangi-2gil 29 Wolhang-myeon, Seongju-gun, Gyeongbuk, Korea. Tel : +82-54-931-0890
- Ulsan Factory: Nongong-gil 83 Yangdeung-ri, Sangbuk-myeon, Ulju-gun, Ulsan, Korea. Tel : +82-52-264-4590
- INDONESIA Factory: PT.Dongwoo Surfacetech Indonesia. Cikarang Square, Lantai 1, Blck B23, JI. Cikarang Cibarusah Km.40, Cikarang Selatna, Bekasi, Indonesia
- CHINA Factory: Dongwoo Dongam[Wuxi] Heat Treatment Co.,Ltd Wuxi Wind Power Technology Park, Huishan Zone, Wuxi, Jiangsu Province, China
- JAPAN Factory: Dongwoo HST Co.,Ltd. 87-1 Mori Kawabata Kusegun Kumiyamacho, Kyoto. Tel : +81-75-632-7527
- CHINA Factory: Dongwoo Dongam[Tainjin] Heat Treatment Systems. No12 Factory, Wenxin Industrial Park, Beichen H-tech Park, Tianjin China. Tel : 86-22-8688-0010
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