MDB是用于自动贩卖机的专用协议，这方面的资料比较少。资料中搜集了一些资料以及这方面的论文,MDB is the vending machine for a special agreement, this information is relatively small. Information collected some information, as well as papers in this area

本设计所要实现的是一个网上售卡系统，主要分为前台管理和后台管理员管理系统两大部分-The design to be achieved is a web Vending system, divided into front and back office management system administrators to manage two major