Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Δευτερόλεπτα χωρίς σφάλμα-el#Sense
EFS-en#Sense
Fehlerfreie Sekunden-de#Sense
SSE-fr#Sense
SSE-es#Sense
Segundos sem erros-pt#Sense
Error-free seconds-da#Sense
Secondes sans erreur-fr#Sense
Segundos sin error-es#Sense
Foutvrije seconden-nl#Sense
Felfria sekunder-sv#Sense
EFS-da#Sense
Secondi senza errore-it#Sense
Virheettömät sekunnit-fi#Sense
Error-free seconds-en#Sense