🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisNederlandsSvenskaРусский한국어中文EntityQ6692715· pop 12· linked from 29 articleslow-background steelsteel produced prior to the detonation of the first atomic bombs in the 1940s and 1950s, and so not contaminated with radionuclidesConnectionswhole body countingEntityWorld War IConceptCategoriesBackground radiationSteels