1.
Judgment of the Friction s Direction in an Object Rolling;
关于物体在滚动时摩擦力方向的判定
2.
The Direction of Static Frictional Force Exerted to Pure Rolling Rigid Body and Its Affectig Factors
刚体纯滚动时静摩擦力方向判定及其影响因素
3.
the Intuitionistic Judgment of Static Friction Force′s Direction and the Question of Work Done During Rigid Body Rolling;
刚体滚动中静摩擦力方向的直观判断及作功问题
4.
Demonstrate the Diretion of Friction Ingeniously with LONG-haired Brush and TUBE - brush;
巧用长毛刷和试管刷演示摩擦力的方向
5.
pertaining to or worked or produced by friction.
关于摩擦或摩擦力，由摩擦或摩擦力产生。
6.
Demonstrate originally the direction of friction in any case with simple method in order to combine the theory with practice.
通过简易实验,形象地演示各种情况下摩擦力的方向。
7.
For sliding contact, the coefficient of kinetic friction Uk is defined as the ratio of the frictional force to the normal force.
滑动接触时，动摩擦系数Uk的定义是摩擦力与法向力的比率。
8.
The counterrotation reduces the net friction torque.
反向旋转减少了净摩擦力。
9.
Simple demonstration of friction force beingthe interactive one;
“摩擦力是相互作用力”的简捷演示方案
10.
If the wall is frictionless, ??is horizontal.
如果墙壁无摩擦，?痪臀0水平方向。
11.
ultimate friction capacity [ground]
极限摩擦力〔土地〕
12.
Calculation method of pressure field distributed parameter of hydraulic friction pairs
液压摩擦副压力场分布参数计算方法
13.
Summarize of Steel Wire Tensility Balance Methods for Multi-rope Friction Hoisting Machinery
多绳摩擦提升机钢丝绳张力平衡方法
14.
Study of Condition Description Method for Tribosystem Based on Tribology and Dynamics
基于摩擦学与动力学的摩擦学系统状态描述方法研究
15.
The forces due to friction are called frictional forces.
由于摩擦而产生的力称之为摩擦力。
16.
Friction gradually caused the sliding box to slow down and stop.
摩擦力使向下滑的箱子渐渐慢下来后停
17.
Friction, Erosion and Research Direction in MEMS
微机械电子系统中的摩擦磨损及研究方向
18.
Relationship of Grinding Textures and Surface Friction Coefficient of Common Steels
常用钢磨削纹理方向与其表面摩擦因数的关系