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1·It shows how to classify the data, build the KRS, reduce the data and get the final decision rules.

包括数据的分类，KRS的建立，数据的约简和决策规则的生成。

2·The KRS 6-type vacuum pump designed run well and could satisfy requirement of vacuum equipment in packaging system.

设计完成的KRS 6型无油旋片真空泵，运行状况良好，能够满足包装系统的真空设备需求。

3·It includes the proposing of the theory, some relevant fundamental concepts, the reduction of data and attributes, KRS, decision analysis, and the reduction of decision rules.

包括理论的提出，一些基本的概念，数据的约简，知识表达系统，属性的约简，决策逻辑和决策规则最小化等。