工程表面结构的粗糙度和波纹度之间一直没有明确的界限， 而它们的产生原因及对零件表面性能的影响却是不同的。最近被国际标准所采纳的ＭＯＴＩＦ法对其作出了特有的规定和表示。本文对ＭＯＴＩＦ基本参数的概念、意义及用法作了简单的介绍 There is no clear boundary between the roughness and waviness of the engineering surface structure, but their causes and the influence on the surface properties of parts are different. The MOTIF Act, recently adopted by international standards, has made its own provisions and representations. This article briefly introduces the concept, meaning and usage of MOTIF basic parameters