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- 4路电话来电显示 用51单片机98c2501和4个FSK解码芯片ht9032d实现-4-way phone calls show 98c2501 microcontroller with 51 and 4 FSK decoder chip ht9032d achieve
networkcontrolsystem
- 基于电话网络的远程监测系统 附原理图及PCB图-Telephone network-based remote monitoring system attached schematic diagram and PCB