The device classes present in the system (classes include disks, partitions, and so on).
设备在系统中的类别描述(类别包括磁盘，分区等等)。
It creates a huge application development framework, with which you can design really powerful graphical UI that will be portable across different device classes.
QT创建了一个庞大的程序开发框架，可用来设计强大的图形化界面，移植到各种设备中。
In Part 1, I have demonstrated how to enumerate device classes.
在第1部分，我演示了如何枚举设备类。
This is a read-only set of properties that define the device's major and minor device classes and its services.
这是一个只读的属性集合，它定义了设备的主要和次要的设备类以及它的服务。
Select only those device classes or devices which you know could be on the new computer.
只选择安装在新计算机中的已知设备或设备类。
Select only those device classes or devices which you know could be on the new computer.
只选择安装在新计算机中的已知设备或设备类。
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