易留言本系统,一个小巧的留言本管理系统,功能全面,简单易学-Easy Message this system, a small message to this management system, full-featured, easy to learn

电阻读色环程序的工程文件及色环规则,代码详尽，简单，易学-Resistance reading color wheel program works documents and color ring rules, code in detail, simple, easy to learn