Operation of a Link Test. The operation is only used to maintain a long connection between two communication parties.
链路检测操作。本操作仅适用于通信双方采用长连接通信方式时用于保持连接。
Operation of a Link Test. The operation is only used to maintain a long connection between two communication parties.
链路检测操作。本操作仅适用于通信双方采用长连接通信方式时用于保持连接。
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