短語(yǔ)詞組短語(yǔ)coefficient E of sliding friction 滑動(dòng)摩擦系數(shù)coefficient ? of sliding friction 滑動(dòng)摩擦系數(shù)coefficient u of sliding friction 滑動(dòng)摩擦系數(shù)sliding coefficient of friction 滑動(dòng)摩擦系數(shù) 返回 coefficient of sliding friction