名词
中文翻译：流线型截面的主轴
同义词：
['main shaft', 'main axis例句：1. The engineer designed the machine to have a spindle of streamline section.（工程师设计的机器具有流线型截面的主轴。）']
例句：
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1. The engineer designed the machine to have a spindle of streamline section.
工程师设计的机器具有流线型截面的主轴。
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2. The new car has a sleek design with a spindle of streamline section.
这款新车拥有流线型设计的光滑外观，主轴也经过精心打磨。
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3. The construction project required the installation of a spindle of streamline section in the foundation.
建筑项目需要安装一个流线型截面的主轴在地基中。