名词
中文翻译：传动主轴
同义词：
['transmission shaft', 'transmission rod', 'transmission shaft assembly']
例句：
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1. The transmission mainshaft is vital for the smooth operation of the vehicle's gearbox.
传动主轴对于车辆变速箱的平稳运行至关重要。
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2.The engineer carefully inspected the transmission main shaft to ensure it was functioning correctly.
工程师仔细检查了传动主轴，确保其正确工作。
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3. During maintenance, the technician replaced the damaged transmission main shaft.
在维护期间，技术人员更换了损坏的传动主轴。