84-1, Samjung-Ri, Daeso-Myun, Eumsung-Gun, Choongbook, Korea, Zip : 369-820
Tel / 82-43-877-2969   Fax / 82-43-877-2968    E-mail / daehan@geosko.com
 
Saejin B/D 4F, 54-6, Gui-2Dong. Gwangjin-Gu, Seoul, Korea, Zip : 143-202
Tel / 82-2-456-4900   Fax / 82-2-456-7210   E-mail / daehan@geosko.com