10.98 21 gush 1998
IEC
TC 1
International Standard
PUBLISHED
IEC 60050-721:1991 ED1
PUBLISHED
IEC 60050-721:1991/AMD1:2016 ED1
PUBLISHED
IEC 60050-721:1991/AMD2:2017 ED1
PUBLISHED
IEC 60050-721:1991/AMD3:2018 ED1
PUBLISHED
IEC 60050-721:1991/AMD4:2019 ED1
PUBLISHED
IEC 60050-721:1991/AMD5:2021 ED1
ABANDON
IEC 60050-721 ED2
10.98
New project rejected
21 gush 1998