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Betaradioaktivität f
nucl.phys., радиоакт.	ß-radioactivity (property); ß-activity
nucl.pow.	beta radioactivity
радиоакт.	beta-activity; ß-activity (in Bq); beta-radioactivity; ß-radioactivity; beta radioactive material; beta active material; ß-radioactive material; ß-active material; beta activity