之前的PCB设计\Sheet1.sch .............\PCB原理图.jpg .............\bottom layer.jpg .............\top layer.jpg .............\电路原理图.jpg .............\PCB1.PcbDocPreview .............\Sheet1.schPreview .............\PCB1.PcbDoc .............\History\PCB1.~(1).PcbDoc.Zip .............\.......\PCB1.~(2).PcbDoc.Zip .............\History 之前的PCB设计