源代码控制系统允许用户“回滚”到以前的文件版本，从而恢复以前的状态或从错误中恢复。

Source control allows you to "roll back" to a previous iteration of a file to restore the status quo or to recover from an error.

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控制系统逻辑错误不会导致危险状况。

Errorss in the control system logic do not lead to hazardous situations.

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主要特点1、微电脑控制系统，稳定性高，且具备自我监测功能，可显示错误讯息，易于维修。

Features 1, Microcomputer control system, high stability, and with self-monitoring function, can display an error message, easy to maintain.

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