本书适合于具有一定protel99使用基础的设计人员阅读，书中所介绍的典型技巧和各种辅助设计工具的使用方法，有助于读者迅速提够protel99的应用的水平！-This book is suitable for use with a certain protel99 designers based reading, the book describes a variety of typical aided design techniques and tools to use to help the reader quickly enough to mention the level of the application protel99!