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Fotothek df tg Geometrie Vermessung Instrument Spirale. Scan Deutsche Fotothek dftg color MIKCenter Berlin GmbH Abbildung Nr Nrnberg Winkelinstrument Jakobsstab Proportionalzirkel Bleiwaage Konstruktion von Spiralen Papier Kupferstich cm Geometrie Vermessung Instrument Spirale ppn Druck Deutsche Fotothek gefrdert von der