“OPTIMALISASI SISTEM WAKTU SERVICE ENGINE DAN P2H PADA ALAT BERAT OHT CAT 777 DI PT. SAPTAINDRA SEJATI SITE ADMO KALIMANTAN SELATAN ” (2023) Injection: Indonesian Journal of Vocational Mechanical Engineering, 3(2), pp. 52–57. doi:10.58466/injection.v3i2.1774.