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kasutusest kõrvaldatud | kinnine kiirgusallikas
| kinnine kiirgusallikas | |
| nucl.phys. nucl.pow. | sealed radioactive source; sealed source |
| kasutusest: 4 phrases in 3 subjects |
| Environment | 1 |
| Fish farming pisciculture | 2 |
| Nuclear physics | 1 |