beta-radioactive nucleus beta ray beta-ray electroscope beta-ray emitter beta-ray isotope beta-rubber beta spectroscopy beta-stable beta-stable isobar beta-stable isotope betatopic beta transition betatron betatron-acceleration duty betatron bar betatron core betatron oscillations betatron radiation beta-unstable beta-unstable isotope |
beta-radioactive nucleus бетаактивно ядро Търсената дума е намерена |