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black light (инфракрасные и ультрафиолетовые лучи); invisible portion of spectrum | |||
invisible spectrum |
невидимая часть спектра : 8 phrases in 6 subjects |
Chemistry | 2 |
Firefighting and fire-control systems | 1 |
Makarov | 2 |
Mass media | 1 |
Optics branch of physics | 1 |
Polygraphy | 1 |