Sinaga, F. T. H., Saragi, J. F. H., Boangmanalu, E. P. D., Pratama, A. B., & Sahat, S. (2026). Efficiency and Performance Analysis of the Design and Construction of a 30 Kg/Hour Coffee Grinding Machine. Journal La Multiapp, 7(3), 552-565. https://doi.org/10.37899/journallamultiapp.v7i3.1416