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Google search volume for "usb总线"

Website results for "usb总线"

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#2,031,568 (-37%) - wch.cn
Title: 南京沁恒电子有限公司--首页
Description: 芯片选型:PCI芯片,USB芯片,USB-HOST芯片,USB转串口芯片,PCI转双串口芯片,数码管显示及键盘扫描芯 片,ISA升级到PCI,扩展ROM电子盘,硬盘和网络安全隔离卡,升级串口到USB,单片机与计算机USB通讯,单片机读