Returns logical name of this batch data stream.
返回此批处理数据流的逻辑名称。
This allows the BDS to initialize the stream for use by the batch step.
这就允许BDS对流进行初始化，以供批处理步骤使用。
This permits accurate prediction of arrival time of the batch interface, shows how much mixing has occurred, and gives time to arrange switching the stream from one tank to another.
这样，可正确预测混油界面到站时间、有多少混油量，并有时间将来油从一个储罐切换到另一个储罐。
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