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阐述了以８７Ｃ５１单片机为核心的数据通讯电源控制电路的组成、原理和特点，该电路结构简单、性能稳定、操作方便．
The composition, principle and characteristics of the data communication power control circuit with 87C51 as its core are described. The circuit has simple structure, stable performance and easy operation.