这是protel初学者可以学习的不错的一本入门书，里边有精彩的实例-This is the beginners can learn a good entry, inside a brilliant example

PCB设计软件，又一PROTEL格式PCB转POWERPCB格式的实用工具软件！-PCB design software PROTEL PCB another format to the format POWERPCB Utility software!

Protel99se-TO-PowerPCB安装方法： 以安装到C:\ddb2PCB为例进行说明. 将解压后将\ddb2pcb整个目录copy到c:运行ddb2pcb.exe即可。-Installation Method: to install to C: \ ddb2PCB described as an example. Decompress after the \ ddb2pcb the entire catalog co