By default, the object supports a dual interface.

默认情况下，对象支持双重接口。

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Types that use a dual interface enable clients to bind to a specific interface layout.

使用双重接口的类型使客户端可以绑定到特定的接口布局。

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At OPCClient, MFC and ATL realize the communication between OPCServer and OPCClient with the programming method of single interface and dual interface respectively.

在客户端MFC和ATL分别通过单接口和双接口的编程方法实现与OPC服务器的通信。

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At OPCClient, MFC and ATL realize the communication between OPCServer and OPCClient with the programming method of single interface and dual interface respectively.

在客户端MFC和ATL分别通过单接口和双接口的编程方法实现与OPC服务器的通信。

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