Basical and constructional material section

Phan Van Tien
Pham Hong Son
Nguyen Huu Cuong
Nguyen Trong Kien
Nguyen  Thi Kieu Vinh
Cao  Thi Hao
Doan Thi  Huong
Nguyen Thi  Duyen
Pham Ngoc  Minh
Tran Viet  Linh