T. S. Eyre-Wear is one of the three most com-monly encountered industrial problems leading to the replacement of components and assemblies in engineering, the others being fatigue and corrosion. Wear is rarely catastropic,but it reduces operating efficiency by increasing the power losses, oil con-sumption, and the rate of component replacement. Wear, as part of the tribology scene, is now receiving con-siderably more attention, although still lagging behind fatigue and corrosion .research effort. Sufficient is known about wear mechanisms and their solu- tion to encourage greater application of this knowledge. There are, however, a number of proolems which cause con- sider~le difficulty in translating the results of research into industria] practice. TE 99 通用摩擦磨損試驗機