名词
中文翻译：直筒轴
同义词：
['straight shaft', "straight shaft shaft例句：1. The car's engine is running smoothly", 'with a plain shaft.（这辆车的引擎运行得很平稳，有一个直筒轴。）']
例句：
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1. The car's engine is running smoothly, with a plain shaft.
这辆车的引擎运行得很平稳，有一个直筒轴。
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2.The engineer used a plain shaft to make the machine work better.
工程师使用一个直筒轴使机器工作得更好。
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3. The plain shaft was made of steel and had a diameter of 50mm.
这个直筒轴是用钢制成的，直径为50毫米。