短語詞組短語friction peak angle 峰值摩擦角friction pesidual angle 殘餘摩擦角friction n angle 摩擦角internal friction angle 摩擦角dynamic friction angle 動(dòng)摩擦角Peak friction angle 尖峰摩擦角ultimate friction angle 極限摩擦角submarine internal friction angle 水下內(nèi)摩擦角 返回 friction angle