Boonsin Nadondu
Program in Production Technology, Faculty of Agricultural and Industrial Technology, Phetchabun Rajabhat University
Thailand

Thongchai Khrueaphue
Program in Production Technology, Faculty of Agricultural and Industrial Technology, Phetchabun Rajabhat University
Thailand

Program in Production Technology, Faculty of Agricultural and Industrial Technology, Phetchabun Rajabhat University

Sermsak Thipwong
Program in Industrial Electrical Technology, Faculty of Agricultural and Industrial Technology, Phetchabun Rajabhat University
Thailand

Parinyawatr Dhinnabutra
Program of Welding Engineering, Faculty of Technical Education, Rajamangala University of Technology Isan, Khon Kaen
Thailand

Saksit Chuenchomnakjad
Program in Industrial Engineering, Faculty of Engeneering, Rajamangala University of Technology Lanna, Phitsanulok
Thailand