DLT 634.5104-2009 远动设备及系统 第5-104部分：传输规约 采用标准传输规约集的IEC 60870-5-101网络访问(DLT 634.5104-2009 telecontrol equipment and systems - Part 5-104: transmission protocol access to IEC 60870-5-101 networks using standard transport protocol set)