无摩擦的

The experimental results reveal that there is no apparent difference in the frequency of sounds generated by the friction and collision between two stones, although the sounds may differ in pressure.

由实验结果可知，摩擦与撞击这两种不同的运动机制所产生的地声音频讯号，除声压强度上会有显著的差异之外，其在频谱上并无太大的差异性存在，这可能是因为摩擦运动基本上也可视其为无数个小撞击运动，因此其所产生之地声声纹基本上大同小异。

The influence of with or without longitudinal joint, with or without initial opening, with or without filling in the joints and different friction factor in the joint face and so on are studied on the seismic response of Fengman Dam. Thus the conclusions for gravity dams with longitudinal joints is drawn.

对于丰满重力坝，本文考虑了有、无纵缝，纵缝有、无宽度，纵缝有、无填充物及缝面的不同摩擦系数等情况，进行了静动组合的地震反应分析，对存在纵缝的重力坝的抗震特性得出了一系列规律性的认识。

Is specialized in all types of motorcycle clutch with the friction plate, clutch pieces and accessories research, development and production of professional enterprise.

所生产的摩擦片均达到国家标准（GB13826-92B）规定的技术要求，通过了"武汉材料保护研究所"的相关检测，摩擦片采用无石棉材料生产，符合环保政策要求。

Using pin on disk tribometer, the influence of volume fraction and particle size of SiC on dry friction and wear properties of the SiC/Al composites were investigated.

采用无压浸渗法制备不同碳化硅粒度和体积分数的SiC/Al复合材料，利用销-盘摩擦磨损试验机考察了碳化硅的粒度和体积分数等对SiC/Al复合材料干摩擦磨损性能的影响，采用扫描电子显微镜观察磨损表面形貌并分析其磨损机理。

SiC/Al composites were prepared with pressureless infiltration method. Using pin on disk tribometer, the influence of volume fraction and particle size of SiC on dry friction and wear properties of the SiC/Al composites were investigated. The wear mechanism of the composites was studied with the analysis of the worn surface by SEM.

采用无压浸渗法制备不同碳化硅粒度和体积分数的SiC/Al复合材料，利用销－盘摩擦磨损试验机考察了碳化硅的粒度和体积分数等对SiC/Al复合材料干摩擦磨损性能的影响，采用扫描电子显微镜观察磨损表面形貌并分析其磨损机理。

Tri--1,3,5-triazin, an ashless and phosphorus free water-soluble compound, was synthesized and its structure was analyzed by infrared spectroscopy.

对摩擦性能优良的三嗪杂环进行水溶性改良，合成了一种无灰无磷水基润滑添加剂2 ，4 ，6-三(N，N-二羟乙基氨基亚甲基硫代)-均三嗪，并用红外光谱仪对其结构进行了分析。

A novel C/C/Cu composite with excellent wear resistance was fabricated by pressureless infiltration.

采用无压熔渗工艺制备一种新型的具有优异耐磨性能的碳纤维整体织物/炭/铜复合材料，在UMT-3多功能摩擦磨损测试仪上考察复合材料的摩擦磨损行为，并与粉末冶金方法制备的滑板用炭/铜复合材料进行了对比分析。

In the absence of such a high degree of cleanliness, adsorbed gases, water vapor, oxides, and contaminants reduce friction and the tendency to seize but usually result in severe wear; this is called "unlubricated" or dry sliding.

由于无法实现如此高的清洁度，摩擦面中的气体，水蒸汽，氧化物及其他污染物会在此过程中减少摩擦力及咬合的趋势，但也往往导致更严重的磨损；这种情况被称为&无润滑&或干摩擦。

The microstructure, phases composition and microhardness of the coating were analyzed and measured by SEM, XRD and microhardness testers respectively, and the friction and wear properties of the specimens sliding against Al2O3 ceramic in a ball-on-discmode and under unlubricated condition were investigated.

中文摘要：采用粉末包埋法在P110钢表面制备渗铬层；借助扫描电子显微镜、X射线衍射仪和显微硬度计，对渗铬层的显微组织、相组成和显微硬度进行了分析和表征，并通过无润滑条件下的球－盘式摩擦磨损试验研究了渗铬处理对其摩擦磨损性能的影响。

Is specialized in all types of motorcycle clutch with the friction plate, clutch pieces and accessories research, development and production of professional enterprise.

所生产的摩擦片均达到国家标准（GB13826-92B）规定的技术要求，通过了&武汉材料保护研究所&的相关检测，摩擦片采用无石棉材料生产，符合环保政策要求。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。