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- AU Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- Am Uilíoch Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- UT | universal time
- en
- Definition the time scale in relation to the rotation of the earth Reference CCIR Rec.460-1
- TU | temps universel
- fr
- Definition échelle de temps liée à la rotation de la Terre Reference CCIR Av 460-1