Gammatech Viet Nam Joint Stock Company Address: No 297B, Au Co Street, Nhat Tan Ward, Tay Ho District, Ha Noi City Enterprise code: 0106201940 Phone: 02437824278 Representative: Nguyen Son Dong Adress: No 297B, Au Co Street, Nhat Tan Ward, Tay Ho District, Ha Noi City Nhat Tan Ward, Tay Ho District, Ha Noi CityFounding date: 10 - 6 - 2013