DIN EN 61158-6-4-2015 工业通信网络.现场总线规范.第6-4部分:应用层协议规范.4型元件 (IEC 61158-6-4-2014);英文版本EN 61158-6-4-2014,仅为CD-ROM
Industrial communication networks - Fieldbus specifications - Part 6-4: Application layer protocol specification - Type 4 elements (IEC 61158-6-4:2014); English version EN 61158-6-4:2014, only on CD-ROM