With both high pressure and low pressure protection and compressor, self-checking compressor on and off controlling program, ensuring low noise, long duration and little temperature fluctuation.

采用由高低压力保护的压缩机组，具有自我监测的压缩机起闭控制程序，噪声小，寿命长，温度波动小。

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Lastly, the methods of software redundancy, setting present output state register unit, and setting self checking program to solve the problem of control state being out of order.

对于控制状态失常问题采用软件冗余、设置当前输出状态寄存单元和设置自检程序等对策。

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Self-checking (also called self-validation or integrity checking) is a technique in which a program, while running, checks itself to verify that it has not been modified.

自校验（也叫自验证或完整性校验）就是程序运行期间校验自身代码以确认没有被修改的技术。

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