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Individual
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Individual
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Priority to ES46953ApriorityCriticalpatent/ES46953A1/en
Publication of ES46953A1publicationCriticalpatent/ES46953A1/en
ES46953A1909-12-131909-12-13
A perfected procedure to obtain the hardening of the steel destined to the manufacture of projectiles and diverse pieces.
ExpiredES46953A1
(en)