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Fotothek df tg Geometrie Vermessung Vermessungsinstrument Jakobstab Gradstab Strecken. Scan Deutsche Fotothek dftg color MIKCenter Berlin GmbH Frankfurt Main Lngsstab mit Scala des Jakobstabs Papier Holzschnitt cm Geometrie Vermessung Vermessungsinstrument Jakobstab Gradstab Streckenmessung Winkelmessung ppn Druck Deutsche