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

Suwicha Phuttarat
Program in Industrial Electrical Technology, Faculty of Agricultural and Industrial Technology, Phetchabun Rajabhat University
Thailand

Nisit Ong-art
Program in Industrial Electrical Technology, Faculty of Agricultural and Industrial Technology, Phetchabun Rajabhat University
Thailand