名词
中文翻译：花键元件
同义词：
['spline', 'spline member']
例句：
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1.The engineer used a spline element to adjust the gear ratio.
工程师使用一个花键元件来调整齿轮比。
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2. The spline element was crucial in ensuring the smooth operation of the machine.
花键元件在确保机器平稳运行中至关重要。
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3. The design of the spline element was optimized for maximum durability and efficiency.
花键元件的设计被优化，以实现最大的耐用性和效率。