file:13.PCB设计深入c.avi file:9.集成库的作用和制作c.avi file:8.PCB库的设计b.rmvb file:7.原理图库的设计a.avi file:6.原理图设计深入a.rmvb file:2.电子设计基础知识b.avi file:1.Altium Designer概述b.avi