DK44067C - Fremgangsmaade til Gravering af Cylindre, der er bestemt til at danne mikroskopisk smaa lysbrydende Elementer paa kinematografiske Films.
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Fremgangsmaade til Gravering af Cylindre, der er bestemt til at danne mikroskopisk smaa lysbrydende Elementer paa kinematografiske Films.
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DK44067D1929-07-251930-07-01Fremgangsmaade til Gravering af Cylindre, der er bestemt til at danne mikroskopisk smaa lysbrydende Elementer paa kinematografiske Films.
DK44067C
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