设计模式--介绍了工厂模式,VB.NET-design patterns -- on the factory model, VB.NET

784厂雷达基数据实时复制,监测体扫状态是否正常或延时以及监测网络连接是否断开。- Real-time replication the radar base data of 784 factory, monitoring the volume scan and web connect situation wether it is time-delay or not.