介绍USB技术在第四代数控测井系统中的应用，给出USB应用系统的使用框图、单片机和USB控制器硬件电路的设计。
The utility of USB technology in the fourth generations numerical control logging system is introduced, the frame of application system and the design Microcontroller and USB controller is given.
介绍USB技术在第四代数控测井系统中的应用，给出USB应用系统的使用框图、单片机和USB控制器硬件电路的设计。
The utility of USB technology in the fourth generations numerical control logging system is introduced, the frame of application system and the design Microcontroller and USB controller is given.
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