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Dr. Chaiwat Pooworakulchai
Lecturer, Department of Engineering Law and Inspection, Ramkhamhaeng University, Thailand
E-mail: irrman2002@gmail.com
Dr. Somkiat Thermsuk
Assistant Professor, Department of Production Design Technology, Faculty of Technical Education, Rajamangala University of Technology Isan Khonkaen, Thailand
E-mail: somkiat.eng01@gmail.com. ; somkiat.th@rmuti.ac.th