如果服务总线子系统是纯粹基于消息的，而且支持某种用来等待传入消息的读取方法，它将自动提供这两种类型的交互。
The service bus subsystem automatically provided for both types of interaction, given that it was purely message based and supported a read method that could wait for an incoming message.
这就是两种类型的压缩拦截器之间的显著区别；总线上下文或 SOAP 头中所使用的压缩算法和信息形式是相同的。
That is the significant difference between the two types of compressing interceptor; the compression algorithm and the form of information used in the Bus context or SOAP header is the same.
注意2：如果没有网关服务，则可以通过中介对其他可能在总线上已定义的两种类型的Web服务——入站服务和出站服务——进行传递。
Note 2: If you do not have a Gateway service available it is possible to mediate the two other types of Web service you may have defined on your bus - inbound and outbound services.
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