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Individual
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Priority to ES146045ApriorityCriticalpatent/ES146045A1/es
Publication of ES146045A1publicationCriticalpatent/ES146045A1/es
ES146045A1938-08-191938-08-19Un procedimiento para la fabricación de filamentos de ácido silícico puro, especialmente de cuarzo.
ExpiredES146045A1
(es)