2023. OPTIMIZATION OF ENGINE SERVICE TIME SYSTEM AND P2H ON OHT CAT 777 HEAVY EQUIPMENT AT PT. SITUS SAPTAINDRA SEJATI ADMO SOUTH KALIMANTAN. Injection: Indonesian Journal of Vocational Mechanical Engineering. 3, 2 (Aug. 2023), 52–57. DOI:https://doi.org/10.58466/injection.v3i2.1774.