Design calculation, electric equipment type selection and graph all are completed by advanced language. It is able to operate on simple microcomputer configuration.
电网的设计计算、电气设备选型及绘图均由高级语言完成，只需简单的微机配置就能实现。
The emphasis was paid on analysis of the working principle, system configuration and device type selection.
重点分析了剩余电流火灾报警系统的工作原理、系统组成、设备选型等有关内容。
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