frictional drag

• 摩擦拽力,摩擦阻力

frictional drag的用法和样例：

例句

1. It has enough energy to overcome the frictional resistance in valves and registers.
   它有足够的能量克服阀门和记录器的摩擦阻力。
2. Application shows that the reformed seal has rational structure, small frictional resistance and good sealing effect.
   几个月的试运行证明，改造后的密封结构合理，摩擦阻力小，密封效果好。