[1]
Riszal, A., Hardin, S.D. , Wardono, H. , ES, M.D.S. and Risano, A.Y.E. 2022. The Effect of the use of Silica Sand Before and After Physical Activation on Acceleration of 4-Step Gasoline Motorcycle Engine. Journal of Engineering and Scientific Research. 4, 1 (Jun. 2022), 30–33. DOI:https://doi.org/10.23960/jesr.v4i1.98.