Powerfail: Only execute the command if init receives a power fail signal.

powerfail：只在init收到电源故障信号时执行命令。

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Powerwait: Only execute the command if init receives a power fail signal, and wait until the process terminates before continuing to scan the inittab file.

powerwait：只在init收到电源故障信号时执行命令，并且等待进程终止后再继续扫描inittab文件。

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Static sensor calibration process and procedure is introduced. A device for automatic sensor parameter calibration and power-fail protection based on 51 single chip computer was designed.

介绍了传感器静态标定过程及步骤，并设计了一种基于51单片机的传感器参数自动标定及掉电记录保护装置。

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Procedure sets off power-fail flag and program block flag, for the implementation of the restoration of the original system after normal starting.

程序中设置掉电标志位和程序段标志位，实现正常上电后原系统运行状态的恢复。

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Procedure sets off power-fail flag and program block flag, for the implementation of the restoration of the original system after normal starting.

程序中设置掉电标志位和程序段标志位，实现正常上电后原系统运行状态的恢复。

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