绝对粗糙度 meaning in English

a olute roughne
absolute roughness

Studies experimentally the pressure drop of two common kinds of flexible duct in fully extended state and obtains their absolute roughness
通过实验研究了两种常用柔性风管在全伸展状态时的压力损失，得出了它们的绝对粗糙度值。
According to the the regression analysis on the bloting and shotcreting roadways of henan pingmei group , the regression equation on the degree that absolute grade and area of roadway influence coefficient of frictional resistance is built in the paper . the notable character test of the regression equation is completed . at last , the degree that absolute grade and area of roadway influence coefficient of frictional resistance is discussed and summed up . the practical and guiding sense in choosing coefficient of frictional resistance of congeneric roadways is given in the paper
通过对平煤集团大量的锚喷巷道的回归分析，建立了巷道壁面绝对粗糙度和巷道断面积对摩擦阻力系数影响程度的回归方程，并对回归方程作了显著性检验，最后对巷道粗糙程度和断面积对锚喷巷道摩擦阻力系数的影响程度进行了讨论和总结，对同类巷道摩擦阻力系数的选取具有实践指导意义。