We introduce a new solution for book-accompanying CD-ROM: virtual drive. A type of virtual drive is recommended, and its installation, compilation and usage is introduced.
本文提出了用虚拟光驱对随书光盘进行管理的解决方案：虚拟光驱。我们推荐了一款虚拟光驱软件，并介绍其安装配置和使用方式。
It analyzes and compares the direct current motor drive system and AC motor drive system and includes the theory of motor running, at last we bring forward some solutions to control the torque.
对直流电机驱动系统和交流电机驱动系统进行了分析对比，并根据电机运行原理，提出了几种转距控制方案。
It analyzes and compares the direct current motor drive system and AC motor drive system and includes the theory of motor running, at last we bring forward some solutions to control the torque.
对直流电机驱动系统和交流电机驱动系统进行了分析对比，并根据电机运行原理，提出了几种转距控制方案。
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