This section walks through the construction of a few system calls to demonstrate their implementation and use by a user-space application.

本节将介绍几个系统调用的构造，从而展示它们的实现和用户空间应用程序对它们的使用。

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Construction and application of GIS-based power distribution management system.

基于GIS的配电网管理系统的建设与应用。

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The construction, technical features, software function and application results of this system are introduced.

介绍了系统构成、技术特点、软件功能和应用效果。

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