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DIONISOTTI JOSEPH
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DIONISOTTI JOSEPH
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Application filed by DIONISOTTI JOSEPHfiledCriticalDIONISOTTI JOSEPH
Priority to ES0180639ApriorityCriticalpatent/ES180639A1/es
Publication of ES180639A1publicationCriticalpatent/ES180639A1/es
Trépano para trabajos de minería, que tiene coronas de cortes superpuestos cuyos diámetros aumentan a partir de la punta del trépano, caracterizado porque estas coronas están dispuestas en torno de una cavidad en cuyo interior puede evacuarse una parte de los residuos de la perforación.
ES0180639A1947-11-261947-11-26Un trepano para trabajos de minas
ExpiredES180639A1
(es)