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bakgrund | |||
normal bakgrundsstrålning | |||
tonplatta |
tausta : 11 phrases in 10 subjects |
Chemistry | 1 |
Communications | 1 |
Electronics | 1 |
Environment | 2 |
General | 1 |
Immigration and citizenship | 1 |
Industry | 1 |
Information technology | 1 |
Politics | 1 |
Research and development | 1 |