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Verfahren zur Herstellung von Tei len kleiner Abmessungen, wie aufgesetzte Zifferblattzeichen, fur Uhrenzifferblat ter, Uhrzeiger und Aufzugskronen fur kleine Uhren od dgl
Study on Shearing by Parallel and Straight Cutting Edges--Tool Life Tests in Shearing of Kovar Thin Sheets by Parallel and Straight Cutting Edges. I.(Retroactive Coverage)