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| émission en arrière-plan | |||
| rayonnement ambiant | |||
| bruit de fond; fond naturel de rayonnement; rayonnement ionisant naturel; fond de rayonnement | |||
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bakgrundsstrålning : 4 phrases in 3 subjects |
| Electronics | 2 |
| Life sciences | 1 |
| Medical | 1 |
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