Phoutsavanh Chandavong Faculty of Industrial Technology, Ubon Ratcahthani Rajabhat University, Ubon Ratchathani Thailand
Komson Daroj Faculty of Industrial Technology, Ubon Ratcahthani Rajabhat University, Ubon Ratchathani Thailand
Danu Wiroteurairuang Faculty of Industrial Technology, Ubon Ratcahthani Rajabhat University, Ubon Ratchathani Thailand