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crankshaft

noun
🔊/ˈkræŋkʃɑːft/
🔊/ˈkræŋkʃæft/
 (specialist)
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  1. a long piece of metal in a vehicle that connects the engine to the wheels and helps turn the engine’s power into movement曲轴；曲柄轴Topics Transport by car or lorryc2