Bui Khac Khanh, & Nguyen Thanh Phu. (2024). RESEARCHING ON EFFECT OF d/D AND H/D RATIOS TO MACHING FORCE IN BACKWARD EXTRUSION TECHNOLOGY FOR PIPE PARTS FROM HIGH - STRENGTH LOW ALLOY - STEEL. Journal of Applied Science and Technology, 43, 52-27. Retrieved from http://tapchi.utehy.edu.vn/index.php/jst/article/view/731