This might be in the area of special interface circuitry, or auxiliary DC voltage sources.
这可能是在特殊接口电路，或辅助直流电压源方面。
The design of the hardware interface circuitry and source codes of main programs are also presented.
给出了硬件接口电路的设计与实现方法，并且提供了主要程序源代码。
The design of the hardware interface circuitry and source codes of main programs are also presented.
给出了硬件接口电路的设计与实现方法，并且提供了主要程序源代码。
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