名词
中文翻译：按钮头弹簧
同义词：
['button head', 'button spring']
例句：
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1.The new car has a button-head spring that makes it easy to start.
这款新车有一个按钮头弹簧，使得启动变得很容易。
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2.The old clock had a button-head spring that was worn out and needed to be replaced.
旧时钟有一个按钮头弹簧，已经磨损需要更换。
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3. The engineer used a button-head spring to make the machine run more smoothly.
工程师使用了一个按钮头弹簧使机器运行更加顺畅。