“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), pp. 563–569. doi:10.33379/gtech.v7i2.2326.