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protective task | |||
radiation shielding problem (от излучений); shielding problem (от излучений) |
задача защиты: 10 phrases in 7 subjects |
Energy industry | 1 |
Mathematics | 1 |
Military | 4 |
Programming | 1 |
Security systems | 1 |
Telecommunications | 1 |
Weapons of mass destruction | 1 |