crankshaft

Từ điển Oxford Advanced Learner 8th

crank·shaft [crankshaft crankshafts] BrE [ˈkræŋkʃɑːft] NAmE [ˈkræŋkʃæft] noun (technical)
a long piece of metal in a vehicle that connects the engine to the wheels and helps turn the engine's power into movement