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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 |