Based on the design feature of sugarcane harvester, this paper aim to introduce the object-relation database managing system technology into the design system.

本文针对甘蔗收获机械的设计特点，将对象-关系数据库管理系统技术引入设计系统中。

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It is an important research content of GIS fields in the recent years to store and manage mass GIS basic graphics data and attribute data using object-relation database.

使用对象关系型数据库来一体化存储和管理海量的GIS基础图形数据和属性数据是近年来GIS领域研究的一项重点内容。

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This article introduces the work stream in designing of object relation database, and mainly discusses the ways of mapping from the class model to the relational model.

介绍对象关系数据库设计的工作流程，讨论如何将类模型映射到关系模型。

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