名词
中文翻译：液压换挡装置单元
同义词：
['hydraulic shifter', 'hydraulic shifter assembly']
例句：
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1. The hydraulic shifter unit is responsible for shifting gears smoothly.
液压换挡装置单元负责平滑地换挡。
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2. The engineer installed a new hydraulic shifter unit to improve the vehicle's performance.
工程师安装了一个新的液压换挡装置单元，以提高车辆的性能。
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3. The hydraulic shifter unit was designed to be easy to maintain and replace.
液压换挡装置单元设计为易于维护和更换。