名词
中文翻译：曲轴键
同义词：
['crankshaft key', 'crankshaft bolt', 'crankshaft pin']
例句：
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1. The car's engine is running smoothly because the crankshaft key is in place.
汽车发动机运行顺畅，因为曲轴键已经到位。
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2.The mechanic replaced the crankshaft key with a new one to fix the engine.
机械师用一个新的曲轴键替换了旧的，以修复发动机。
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3.The car's performance was improved significantly after the crankshaft key was replaced.
更换曲轴键后，汽车的性能有了显著提升。