定义静态类别以包含扩充方法。

Define a static class to contain the extension method.

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以至少与包含类别相同的可视性，将扩充方法实作为静态方法。

Implement the extension method as a static method with at least the same visibility as the containing class.

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描述了NEAX61E程控交换机内存储器的管理、扩充方法和注意事项。

This article describes the management, extending methods and attentive problems for the internal storage of NEAX61E SPC exchange.

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