Information systems interconnection ; relaying the connectionless - mode network service ; part 9 : profile ra51 . 1121 m - it - 02 r 22 over digital data circuit csdn leased line 外形;标记;显示装置;晶体;接线端;液体;尺寸;布排
Information technology - international standardized profile ra - relaying the connectionless - mode network service - definition of profile ra51 . 1121 , relaying the connectionless - mode network service between csma cd lan subnetworks and psdns using virtual calls over a digital data circuit csdn leased line permanent access 信息技术.国际标准华轮廓ra .转接无连接方式的网络服务.第9部分: ra51 . 1121轮廓的定义.数字数据电路csdn租用的线路固定访问的虚拟呼叫转接csma cd lan子网与psdns间的无连接方式的网络服务
百科解释
The "Chinese Software Developer Network" or "China Software Developer Network", (CSDN), operated by Bailian Midami Digital Technology Co., Ltd.