在重写启用活对象设置保护和处理之前保留槽的原始值。

Preserving a slot's original value before overwriting enables the live object set to be preserved and processed.

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介绍了煤矿井下设置保护接地网的原因及重要性。

The reasons and importance of setting underground protective grounding net to coal mine are introduced.

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常见的系统设置保护，只允许可信任的程序，以更新他们。

Common system Settings are protected by only allowing trusted programs to update them.

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