DIN EN 62056-6-1 : 2021 Title: Electricity metering data exchange - The DLMS/COSEM suite - Part 6-1: Object Identification System (OBIS) (IEC 62056-6-1:2017); English version EN 62056-6-1:2017 Year: 2021 Publisher: DIN Media GmbH Availability: Within 1-2 working days