radiation comprising very high energy particles of extra terrestial origin and the secondary particles generated by interaction of these particles with high layers of the atmosphere
Seadus ei reguleeri radoonist tekitatud kiiritust eluruumides, kosmilisest kiirgusest maapinnal ja inimtegevusest puutumatus maakoores sisalduvatest radionukliididest tekitatud kiiritust maapinna kohal.
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