Mech. Engg, M.Sc., Mohammed H. Salih, and Dr. Aziz H. Al - Hilfi. 2006. “Theoretical and Practical Evaluation of Plastic Deformation and Straining Throughout Cupping the Shells of Domestic LPG Cylinders”. Al-Rafidain Engineering Journal (AREJ) 14 (1):87-101. https://doi.org/10.33899/rengj.2006.46237.