流体流经管道时，由于管道表面的摩擦力而产生力头损失。
While fluids flow through a pipe, dynamics loses because of the surface friction of pipe.
流体流经管道时，由于管道表面的摩擦力而产生力头损失。
The pressure head of the liquid will decrease due to the friction on the surface of pipes when it flows through the pipes.
磨损失效系指表面之间的相对滑动摩擦导致其工作表面金属不断磨损而产生的失效。
Wear failure refers to the relative sliding friction between the surfaces causes the surface of the metal continue to wear their work arising from the failure.
应用推荐