ANALYSIS OF WORK EFFICIENCY ON MAINTENANCE OF CRITICAL BELT CONVEYOR MACHINE COMPONENTS USING THE PREVENTIVE MAINTENANCE APPROACH AT PT VARIA USAHA BETON BRANCH BATANG. (2023). G-Tech: Jurnal Teknologi Terapan, 7(2), 563-569. https://doi.org/10.33379/gtech.v7i2.2326