Nattapong Dussadeeworrarak
<li>Department of Welding Engineering Technology, College of Industrial Technology, King Mongkut’s University of Technology North Bangkok</li> Thailand
Pocharapon Silakoop
<li>Thai-German Pre-Engineering School, College of Industrial Technology, King Mongkut’s University of Technology North Bangkok</li> Thailand
Attaphon Kaewvilai
<li>Department of Welding Engineering Technology, College of Industrial Technology, King Mongkut’s University of Technology North Bangkok</li> Thailand
Thammanoon Thaweechai
School of Integrated Science, Kasetsart University Thailand