名词
中文翻译：双速高空对开式传动轴
同义词：
['two-speed overhead shaft', 'two-speed overhead gearbox']
例句：
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1. The newcar has a two-speed overhead countershaft that allows for easy shifting between low and high gears.
这款新车配备了双速高空对开式传动轴，可以轻松地在低速和高速之间切换。
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2.The engineers worked tirelessly to install the two-speed overhead countershaft in the factory.
工程师们不辞辛劳地在工厂安装了双速高空对开式传动轴。
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3. The two-speed overhead countershaft is an essential component of the transmission system, ensuring smooth and efficient operation.
双速高空对开式传动轴是传动系统的关键部件，确保了操作的平稳和高效。