تماشای ویدئو Hobart Institute Oxyacetylene Welding Demo Clip از آی-ویدئو
Hobart Institute's Oxyacetylene Welding demo. New from Hobart Institute of Welding Technology! To order complete training curriculum for your classroom, go to http://www.welding.org/c-43-oxyacetylene-welding-brazing-and-cutting.aspx