论述了实现这个体系结构的几个关键技术：产品数据管理、基于实例的设计、面向成本的设计、虚拟设计。

At last, several key enabling technologies, namely product data management, case based design, design for cost, virtual design and collaborative design are discussed in detail.

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空间数据管理网格将物理分布的空间数据在逻辑上组成一个超大虚拟的空间数据库，实现全国乃至全球的海量空间数据的管理。

Spatial data managing grid can integrate all distributed data into a super-large, virtual spatial DB, it can realize to manage magnanimity spatial data of the whole country or global.

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为了提高虚拟接口存储结构(VISA)存储网络系统的性能，设计实现了基于块级的元数据管理子系统。

To enhance the performance of VISA (virtual interface based storage architecture) storage network system, a new metadata management subsystem is proposed. It is running at block-level.

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