Sinaga FTH, Saragi JFH, Boangmanalu EPD, Pratama AB, Sahat S. Efficiency and Performance Analysis of the Design and Construction of a 30 Kg/Hour Coffee Grinding Machine. JLMA [Internet]. 2026Apr.16 [cited 2026May7];7(3):552-65. Available from: https://newinera.com/index.php/JournalLaMultiapp/article/view/1416