Danang Murdiyanto, Bernardus Crisanto P.B, & Yosep Ardi Ang S. (2021). THE ROLLING PROCESS OF THE STEM OF UMBRELLA GRASS TO PRODUCE FIBER THROUGH THE REDUCTION METHOD USING GEARBOX. Scientific Journal of Mechanical Engineering Kinematika, 6(2), 129-142. https://doi.org/10.20527/sjmekinematika.v6i2.183