您可以使用虚拟打印机从文档中创建图像、传真文档，或将文档发送给一个队列，以针对特定类型的打印机进行格式化。

You can use virtual printers to create images from documents, fax documents, or send documents to a queue to be formatted for a specific type of printer.

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另一个示例是根据属性选择打印机服务时的情况，如场所编号和文档类型。

Another example is the case when a printer service is selected based on the properties, such as the floor number and document type.

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lookupPrintServices返回支持打印特定文档类型(比如gif)的打印机集，和一个特定的属性集(比如双面打印)。

LookupPrintServices returns the set of printers that support printing a specific document type (such as GIF) with a specific set of attributes (such as two sided).

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