The problems are:the storage of cumulating variable at power off, multi-byte division, the detection of rotating speed and the control of facilities by AC power.
这几个问题是：累积量的掉电存储问题、多字节除法问题、转速的检测问题和交流电设备的控制问题。
In order to solve the problems, we designed switch controller guarding against forgetting to turn off power supply based on hardware.
为了避免此类现象的发生，开发设计了基于硬件直接控制的防遗忘关断电源开关控制器。
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