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back-scatter : 70 phrases in 13 subjects |
Chemistry | 1 |
Construction | 2 |
Electrochemistry | 1 |
Electronics | 1 |
Makarov | 5 |
Mass media | 10 |
Metallurgy | 1 |
Nuclear physics | 6 |
Physics | 1 |
Road works | 1 |
Technology | 3 |
Радиоактивное излучение | 25 |
Радиография | 13 |