名词
中文翻译：换挡器
同义词：
['transmission shaft', 'gearbox shaft', 'differential shaft']
例句：
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1.The car's shifting responser transmission shaft is causing problems.
汽车的换挡器传动轴出了问题。
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2. The engineer had to replace the transmission shaft due to wear and tear.
工程师不得不更换传动轴，因为磨损严重。
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3. The new design of the transmission shaft has improved efficiency by 40%.
新型传动轴的设计提高了效率，提高了40%。