Thitinun Pongnam
<p>Department of Mechanical Technology Education (Farm Mechanics), Faculty of Technical Education, Rajamangala University of Technology Khon Kaen Campus, Khon Kaen</p>
Thailand

Banlu Phiachin
<p>Department of Mechanical Technology Education (Farm Mechanics), Faculty of Technical Education, Rajamangala University of Technology Khon Kaen Campus, Khon Kaen</p>
Thailand

Banjob ChamChong
Department of Civil Engineering, Faculty of Engineering, NorthEastern University, Khon Kaen
Thailand

Parinya Thaweephun
Public Works Administration Officer, Subdistrict Municipality Phra Lap, Amphoe Mueang Khon Kaen
Thailand