Ky Thuat Va Thuong Mai Tam Son Joint Stock Company Address: Zoom 107, Khu, Bo Tu Lenh Lang Town, Khu Hao Nam, O Cho Dua Ward, Dong Da District, Ha Noi City Enterprise code: 0101445559 Phone: 0245120871 Representative: Nguyen Kien Cuong Adress: No 1 KTT Luong Thuc P.Van Phuc, Ha Dong District, Ha Noi City O Cho Dua Ward, Dong Da District, Ha Noi CityFounding date: 27 - 2 - 2004