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| Biprisma n; Prismenkreuz n | |||
| Doppelprisma n; Doppelbildprisma n | |||
| двойная призма: 10 phrases in 4 subjects |
| Astronomy | 1 |
| Medical appliances | 3 |
| Optics branch of physics | 5 |
| Technology | 1 |
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