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passive system | |||
direct gain system |
sistema pasivo : 22 phrases in 10 subjects |
Automobiles | 1 |
Communications | 2 |
Electronics | 3 |
Energy industry | 3 |
Information technology | 5 |
Mechanic engineering | 1 |
Meteorology | 2 |
Nuclear physics | 2 |
Transport | 1 |
United Nations | 2 |