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| красный светофильтр | |||
| красный светофильтр (съёмочный или фотолабораторный) | |||
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| красный фильтр (A filter that is used in B&W photography. Increases contrast more than any other filter) | |||
| red filter: 6 phrases in 5 subjects |
| General | 2 |
| Medical | 1 |
| Military | 1 |
| Polygraphy | 1 |
| Technology | 1 |