名词
中文翻译：等效表面积直径
同义词：
['equivalent cross-sectional area', 'equivalent radius']
例句：
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1. The new design is more efficient than the old one in terms of equivalent surface diameter.
在等效表面积直径方面，新设计比旧设计更高效。
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2.The engineer calculated the equivalent cross-sectional area for the piping system.
工程师计算了管道系统的等效横截面积。
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3. The researcher found that the equivalent radius had a significant impact on the material's strength.
研究人员发现等效半径对材料强度有显著影响。