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一种智能收扩机的控制程序，可以让收扩机按编码接收控制指令，具备10位不可更改物理地址码来识别终端身份，开关机操作时能够实现声音的渐强渐弱，即淡入淡出功能。-An intelligent control program and expanding machine, can let the expanding machine receives the control instruction according to the code, have 10 bit can not change the p