短語(yǔ)詞組短語(yǔ)Kinetic Sliding Friction Force 動(dòng)滑動(dòng)摩擦力mean kinetic friction force 平均動(dòng)摩擦力kinetic force of friction 動(dòng)摩擦力kinetic c force of friction 動(dòng)摩擦力 返回 kinetic friction force