简单网络管理协议 SNMP 说明文档(snmp)

一个无环无向连通图称为一棵树。树中一个度为一的点称为叶子结点.(An undirected and undirected graph is called a tree. A point in a tree is called a leaf node. I downloaded something first, and I'm sorry to upload it.)

PB中生成二维码，转化成二进制流存入数据库当中，以及取出在数据窗口中显示(Generate QR codes in PB, convert them into binary streams and store them in the database, and take them out and display them in the data window)