这层水减少了摩擦。
每块阿伦德碎片样本都覆盖着一层黑色的、玻璃样的熔壳，这层熔壳是在它们的外表面与地球大气层摩擦减速中熔化形成的。
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere.
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。
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.
粘性是液体流层问相对运动而产生的摩擦力或阻力。油层间所产生的运动阻力称为粘性摩擦力。
Viscous friction is the fiction, or resistance to relative motion, between adjacent layers of liquid. The resistance of motion between these oil layers is called viscous friction.
这一层太低不适合卫星运行，因为空气的摩擦力会破坏卫星的轨道。
It is too low to fly satellites in since the friction from the small amount of air would destroy their orbits.
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。
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.
利用球盘磨损试验机和电化学综合测试仪研究了IBED膜层的摩擦学性能和电化学腐蚀特性。
The wear resistance and electrochemical corrosion properties of IBED coatings were investigated with ball-on-disk wear tester and electrochemical equipment, respectively.
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。
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.
摩擦学实验表明，镀钼层具有良好的耐磨性和优异的抗擦伤能力。
The tribological experiments showed that the Mo layer possessed a good wear-resistance and an excellent anti-scuffing property.
保温层摩擦力在管道受热膨胀时，能很好的抵消热膨胀力，可以有效地限制管道沿轴向伸长，提高了供热直埋管道的安全性。
Insulation friction in the pipe thermal expansion, well counteract thermal expansion forces can effectively restrict the pipeline along the axial elongation, improved safety Buried heating pipe.
温差越大，无保温管与有保温管伸长量之差越大，则保温层摩擦力越大；
The more pipe have temperature difference, the more pipe elongation and insulation friction.
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 experiment is assumed that the elastic modulus of the steel pipe equal and constant, the insulation layer friction proportional to the difference of elongation.
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 effect of microbubbles in the boundary layer on the skin friction of the plate is presented in this paper based on the computational results.
对不同位移模式下水平微分单元进行受力分析，认为位移模式只影响了层间等效内摩擦角。
By the stress analysis of the differential element under different displacement modes, it is supposed that the displacement mode only influences the equivalent internal friction Angle of interlayer.
阳极氧化层的硬度越大，复合膜摩擦学性能越好。
The hardness of anodic oxidation layer is higher, the tribological property of composite coating is better.
研究结果表明：摩擦力分布和胀径时热轧带钢的层数有关，当热轧带钢卷取到第5层时卷筒进行胀径可建立稳定的卷取状态。
The results indicated that the distribution of frictional force is changed from layer to layer, and 5 layers of strip are enough for stable coiling.
针对以上问题，本文采用双层辉光离子渗金属技术，在不锈钢表面形成渗钛合金层，并对改性层的组织结构、摩擦学性能和腐蚀学性能进行了研究。
To solve these problems, this paper proposed to fabricate a titanium surface alloyed layer on 316L stainless steel substrate by means of the double glow plasma surface alloying technique.
针对以上问题，本文采用双层辉光离子渗金属技术，在不锈钢表面形成渗钛合金层，并对改性层的组织结构、摩擦学性能和腐蚀学性能进行了研究。
To solve these problems, this paper proposed to fabricate a titanium surface alloyed layer on 316L stainless steel substrate by means of the double glow plasma surface alloying technique.
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