Simorangkir, Michael, Yohanes Yohanes, & Muftil Badri.
" Effect of Spindle Speed of Bar-Plate Rotary Friction Welding Machine on Joint Interface Area and Hardness Value." <em>Journal of Ocean, Mechanical and Aerospace -science and engineering-</em> [Online], 67.1 (2023): 34-39. Web. 19 Aug. 2024