Mangkona, B. Cante, H. Basri, and Adriansyah. “Analisa Kerusakan Relay Valve Dan Air Dryer Pada Air Charging System Unit Heavy Equipment Off Highway Truck (OHT) 777D Caterpillar”. MEDIA PERSPEKTIF : Journal of Technology, Vol. 12, no. 1, June 2020, pp. 33-41, doi:10.46964/mediaperspektif.v12i1.1354.