Kumbhar SV, Takale AM, Badiwale AH, Gawali AD, Bhanase BS. Design and Development of Helical Compression Spring Stiffness Testing Machine for I.C. Engine Valves with Stepper Motor by Using Computer Control. ARME [Internet]. 2018 Nov. 5 [cited 2024 May 5];7(2):42-5. Available from: https://ojs.trp.org.in/index.php/arme/article/view/2449