很有用的原理图转换工具，可以把protel的转为powerpcb的-Schematic diagram useful conversion tools, you can turn it into the Protel PowerPCB the

电路原理图转换软件，中文说明文档及软件。可以将protel 99se,orcad,p-cad,cadstar,cadence的电路图文件一步转换成PADS原理图。-protel orcad cadence p-cad cadstar to pads file,to convenience PCB layer,It circuit design fan to help study.