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Widodo, K. R. . ANALISIS KEAUSAN SHAFT PADA FRONT IDLER EXCAVATOR (BACKHOE) HITACHI TIPE EX-100: Shaft Wear Analysis on Front Idler Excavator (Backhoe) Hitachi EX-100 Type. J. Konv. Ener. Manuf. 2022, 7, 56-66.