P. Sawitri and S. Cdr. Sittha and T. Kritsana , An Improvement of Flow Forming Process for Pressure Vessels by Four Rollers Machine. journal = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology. August 2014, vol. 93(9). 1525 - 1529 [viewed 19 September 2024]. Available from: https://publications.waset.org/pdf/9999246.