| 1. | As soon as sliding begins, it is found that the friction force decreases .
人们发现，滑动一开始，摩擦力就减小。 |
| 2. | The friction force is therefore called a nonconservative or a dissipative force .
因此，摩擦力称为非保守力或耗散力。 |
| 3. | When the friction force acts alone, the total mechanical energy is not conserved .
当只有摩擦力作用时，总机械能就不守恒。 |
| 4. | The observed friction force is the force required to break these tiny welds .
我们观察到的摩擦力，就是破坏这些细微的焊接点所需要的力。 |
| 5. | In such a situation he would give anything for the sake of just a little friction force .
在这样的情况下，他会不惜任何代价来换取那怕只是一点儿摩擦力。 |
| 6. | The work of the friction force does depend on the path; the longer the path between two given points, the greater the work .
摩擦力的功则取决于路径，路径越长，功越大。 |
| 7. | Design of mechanism used in friction force measurement by fea
摩擦力测量机构的有限元分析设计 |
| 8. | Effect of heat treatment on the friction forces between archwires and brackets
脱落托槽热处理后对摩擦力影响的实验研究 |
| 9. | Side - friction force
侧向摩擦力 |
| 10. | Pneumatic fluid power systems . cylinders . measurement of friction forces . laboratory method
气压流体动力系统.气缸.摩擦力测量.实验室方法 |
