This layer of water reduces friction.
这层水减少了摩擦。
The slightest motion of a patient in bed creates friction between skin and sheets and results in loss of cells from the skin's outermost layer.
卧床病人最轻微的活动就会在皮肤和床单之间产生摩擦力，结果就会引起皮肤最外层脱落。
Loose hole plating chromic layer by weight used in the sliding friction parts and heat resistance, corrosion, wear parts, such as internal combustion engine cylinder lumen, piston rings.
松孔镀铬层应用于受重压的滑动摩擦件及耐热、抗蚀、耐磨零件，如内燃机汽缸内腔、活塞环等。
While this contaminant layer is responsible for varying friction values, it plays a beneficial role by separating the wheel and rail surfaces, usually decreasing wear.
轮轨表面的污染层也会影响粘着系数的变化，它避免了轮轨表面直接接触，有利于减少磨损。
Calculation formula of velocity distribution, boundary layer thickness, friction force and loss of water head are given out, in accordance with the result from theory analysis of similitude solution.
对于速度边界层提出了相似性解的解析结果，给出了速度分布、边界层厚度、摩擦阻力和水头损失的解析计算表达式。
The theoretical calibration curves for friction of plastic working was plotted and the exact position of the neutral layer of plastic flow was given in the solution.
进而采用该解绘制塑性加工中测量摩擦系数的理论校准曲线。
The deduction is confirmed by establishing self locking conditions and determining the sliding friction coefficients between sand and chromium plating layer and between sand and nitrided surface.
通过建立砂粒自锁条件及实测长石砂岩、石英砂岩与泵筒镀铬层或氮化层的滑动摩擦系数值，证实了对柱塞拉伤失效原因的推测是正确的。
But the theory about the flow regime of the wave boundary layer, the wave friction factor, the bed shear stress and the initiation of sediment motion has not developed very well.
而且波浪是海岸地区一个非常重要的海洋水动力因素，波浪作用下底部边界层的流态、底摩阻系数、床面剪应力和泥沙起动的理论还不成熟。
The surface transition layer makes the film surface smoothness greatly improve and the dynamic friction coefficient decrease.
镀有过渡膜的样品具有最为平整的表面形貌和最小的表面动摩擦系数。
The experiment is assumed that the elastic modulus of the steel pipe equal and constant, the insulation layer friction proportional to the difference of elongation.
若实验过程中假设钢管的弹性模量和钢材的弹性模量相等且为常数，则保温层摩擦力和无保温管与有保温管伸长量之差成正比；
The results showed that the sulphide layer could improve the anti scuffing property of steel at low speed remarkably, and showed excellent friction reducing and wear resistant effects.
结果表明：在低速条件下渗硫层可显著改善钢表面的抗擦伤性能，且具有较好的减摩耐磨作用。
But as experiment time increases, the effect of increasing friction for driving drum with concave covering-layer is decreased, and much lower than the driving drum with convexity covering-layer.
但是凹坑形仿生非光滑传动滚筒随着实验时间的增长，其增摩效果受到一定的影响，效果不如凸包形仿生非光滑传动滚筒。
The effect of microbubbles in the boundary layer on the skin friction of the plate is presented in this paper based on the computational results.
本文根据计算结果，研究了边界层中的微气泡对平板表面摩擦阻力的影响。
The invention discloses an alloy coating bushing which comprises a steel backing layer, a substrate layer, a nickel grid layer and a friction-reducing layer which are sequentially arranged.
本发明公开了一种合金镀层轴瓦，包括依次设置的钢背层、基底层、镍栅层和减摩层。
PTFE-bronze powder-steel is a widely used three-layer self-lubricating bearing material with good anti-friction and anti-wear.
聚四氟乙烯（PTFE）-铜粉-钢背复合材料是一种广泛应用的三层结构自润滑轴承材料，具有良好的减摩耐磨性能。
When applying ANSYS, we should focus on width of continuously reinforced concrete under layer, binding course friction coefficient, dynamic property and so nonlinear factors.
运用ANSYS求解时，着重分析连续配筋水泥混凝土板宽、动力特性等非线性因素。
When applying ANSYS, we should focus on width of continuously reinforced concrete under layer, binding course friction coefficient, dynamic property and so nonlinear factors.
运用ANSYS求解时，着重分析连续配筋水泥混凝土板宽、动力特性等非线性因素。
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