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beta radioactive material; beta active material; ß-radioactive material; ß-active material; beta radioactivity; ß-radioactivity (property); beta activity; ß-activity |
activité ß : 9 phrases in 5 subjects |
Finances | 1 |
Fish farming pisciculture | 1 |
General | 3 |
Nuclear physics | 3 |
Research and development | 1 |