Besonderhede van voorbeeld: -5007981462218655895

English

Even well-lubricated jack screws have efficiencies of only 15% - 20%, the rest of the work applied in turning them is lost to friction.

Chinese

甚至經過潤滑後的螺旋千斤頂也只能達到15%-20%機械效率,其它的轉動所做的功都損耗在摩擦效應。