Nattapong Dussadeeworrarak
Department of Welding Engineering Technology, College of Industrial Technology, King Mongkut’s University of Technology North Bangkok
Thailand

Pocharapon Silakoop
Thai-German Pre-Engineering School, College of Industrial Technology, King Mongkut’s University of Technology North Bangkok
Thailand

Attaphon Kaewvilai
Department of Welding Engineering Technology, College of Industrial Technology, King Mongkut’s University of Technology North Bangkok
Thailand

Thammanoon Thaweechai
School of Integrated Science, Kasetsart University
Thailand