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| Aufrichtesystem n (optical relay used in visual instruments for changing the orientation of the image so that the observer sees it in its proper attitude, i.e. right-handed and erect); Umkehrsystem n (optical relay used in visual instruments for changing the orientation of the image so that the observer sees it in its proper attitude, i. e. right-handed and erect) | |||
| Aufrichtungssystem n; Umkehrsystem n | |||
| erecting system: 15 phrases in 2 subjects |
| Optics branch of physics | 12 |
| Physics | 3 |