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frictional resistance
This paper tries to pinpoint the frictional drag coefficients of dilute polymer solutions flowing through canvas hoses, obtained by experimental methods.
本文对高聚物稀溶液在帆布管内流动的摩阻系数进行了实验研究。
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Frictional drag means the air closest to the surface of the fuselage moves more slowly than the rest.
ECONOMIST: The aircraft of the future
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