Nemy Hermidilla Chavez และ Ryan Jeffrey P. Curbano. (2021) Reduction of Welding Porosity Rate in Manual Butt Joint Welding Process in a Boiler Manufacturing Company. Rangsit University:ม.ป.ท.Nemy Hermidilla Chavez และ Ryan Jeffrey P. Curbano. 2021. Reduction of Welding Porosity Rate in Manual Butt Joint Welding Process in a Boiler Manufacturing Company. ม.ป.ท.:Rangsit University;Nemy Hermidilla Chavez และ Ryan Jeffrey P. Curbano. Reduction of Welding Porosity Rate in Manual Butt Joint Welding Process in a Boiler Manufacturing Company. ม.ป.ท.:Rangsit University, 2021. Print.