PUBLISHED
IEC 60050-691:1973 ED1
PUBLISHED
IEC 60050-691:1973 ED1
PUBLISHED
IEC 60050-691:1973/AMD1:2019 ED1
IN_DEVELOPMENT
IEC 60050-691/AMD2 ED1
20.99
WD approved for registration as CD
16 mar 2020
ABANDON
IEC 60050-691 ED2