The Journal of King Mongkut's University of Technology North Bangkok
วารสารวิชาการพระจอมเกล้าพระนครเหนือ

Pisizchai Kosasu
Department of Industrial Piping, Faculty of Technical Education, Rajamangala University of Technology Isan, Khonkaen Campus, Khonkaen
Thailand

Sudsakorn Inthidech
Department of Manufacturing Engineering, Faculty of Engineering, Mahasarakham University, Mahasarakham
Thailand