名词
中文翻译：等效粗糙系数
同义词：
['equivalent roughness', 'equivalent roughness factor']
例句：
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1. Theengineer used the formula to calculate the equivalent roughness coefficient of the material.
工程师使用该公式计算材料的等效粗糙系数。
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2.The researcher found that the use of this equivalent roughness coefficient could significantly improve the performance of the machine.
研究者发现，使用这种等效粗糙系数可以显著提高机器的性能。
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3. In engineering design, it is important to consider the effect of the equivalent roughness coefficient on the overall performance of the system.
在工程设计中，考虑等效粗糙系数对系统整体性能的影响是很重要的。