wsd:rj45 pcb 封装库文件，99的，很实用，为懒人准备的

RJ45网口的封装，用于pcb设计，可以直接使用-RJ45 package， used for PCB design

网络接口，链接网线和数据之间的传输，为PCB技术员提供学习交流。。。。。。。。(The network interface, which links the transmission of data between networks and data, provides learning communication for PCB technicians........)