AD常用3D封装整个封装库整理合成了多个常用元件3D封装库，包含各种3D封装，PCB开发必备，使用3D封装使得PCB板摆脱2D视图，3D下更容易查看元件排布是否合理-AD 3D encapsulates the whole package library finishing a number of commonly used synthetic element 3D package library, contains a variety of 3D packaging, PCB development necessary, use 3D package makes the PCB board　the 2D view, 3D are more likely to view the element arrangement is reasonable