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| system of rotation | |||
| erecting system; image-erecting system; inversion system | |||
| erecting eyepiece | |||
| erector tube | |||
| erecting system (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); inverting system (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) | |||
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Umkehrsystem : 4 a las frases, 2 temas |
| Estudios culturales | 2 |
| Física | 2 |