redefinition of SI base units
Gwedd
revised definitions of the SI base units, adopted at the 26th General Conference on Weights and Measures (CGPM), that came into force on 20 May 2019
enghraifft o'r canlynol
digwyddiad
newid
Wikibase reason for deprecated rank
pwynt mewn amser
16 Tachwedd 2018
digwyddiad pwysig
Dod i rym
pwynt mewn amser: 20 Mai 2019
categori Comin
2019 redefinition of the SI base units
Cyfeiriadau
- ↑ Freebase Data Dumps, 28 Hydref 2013