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Publication of CH43042ApublicationCriticalpatent/CH43042A/de
Verfahren zur Herstellung von Prägestempeln aus Stahl durch Abdruck eines Orginalstempels in einer matrize und Abformung der Prägestempel mittels dieser Matrize
Un procedimiento fotomecánico para obtener plaquitas y placas de estampar metálicas, clisés en materias propias para el moldeo, galvanos o clisés en caoutchouc.