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bn:03447259n
Noun Concept
EL
γραμμή του υδρογόνου  ουδέτερο υδρογόνο
EN
The hydrogen line, 21 centimeter line, or H I line is a spectral line that is created by a change in the energy state of solitary, electrically neutral hydrogen atoms. Wikipedia
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γραμμές απορρόφησης
Wikipedia Translations
EL
γραμμή του υδρογόνου, ουδέτερο υδρογόνο

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