“relative roughness factor”的概念、定义、翻译、参考文献-科学参考

单词	relative roughness factor
释义	relative roughness factor [`rel·ǝd·iv ¦rǝf·nǝs ´fak·tǝr] ^{FLUID MECHANICS} Roughness of pipe-wall interior (distance from peaks to valleys) divided by pipe internal diameter; used to modify Reynolds number calculations for fluid flow through pipes.
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