Thunyarat Rerkyai และ Vochai Pruktharatikul. (2012) Torch design to reduce upper arm and shoulder fatigue in welding process of an air conditioning production factory. Mahidol University:ม.ป.ท.Thunyarat Rerkyai และ Vochai Pruktharatikul. 2012. Torch design to reduce upper arm and shoulder fatigue in welding process of an air conditioning production factory. ม.ป.ท.:Mahidol University;Thunyarat Rerkyai และ Vochai Pruktharatikul. Torch design to reduce upper arm and shoulder fatigue in welding process of an air conditioning production factory. ม.ป.ท.:Mahidol University, 2012. Print.