duplex outlet
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一种双侧凸形usb连接器和具有一个或者多个凸形usb连接器的各种卡状器件，可以是单侧或者双侧，其尺寸设计成可嵌入到US B插座内。
A double-sided male USB connector and various card-shaped devices having one or more male USB connectors, which may be single or double sided and are dimensioned to fit into a USB receptacle.
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