主要取引先
Na Duong one member Coal Ltd., Co., Tay Nam Da Mai Coal JSCo., Deo Nai Coal JSCo., Cao Son JSCo., Ha Tu JSCo.,397 Coal Exploitation Enterprise, Mineral Coal Exploitation Enterprise, Thang Long Coal Exploitation Enterprise, Song Da Corporation, Infrastructure development and Construction Corporation – LICOGI; Engineers High Command; Civil Engineering Construction Corporation No. 1; Hydraulic Construction Corporation No.4 and Private Companies
