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Application filed by Georg NikelfiledCriticalGeorg Nikel
Publication of CH17815ApublicationCriticalpatent/CH17815A/de
CH17815A1898-10-291898-10-29Quadratischer, in kreisförmige Parallelbewegung versetzbarer Plansichter mit mehreren untereinander befindlichen Sieben
CH17815A
(de)