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摩擦阻力系数
avia. friction drag coefficient
wind. coefficient of frictional resistance
摩擦阻力系数与井巷或管道壁面粗糙程度和空气密度有关的系数
expl. coefficient of frictional resistance
摩擦阻力 系 数
: 1 phrase in 1 subject
Nautical1

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