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Individual
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Individual
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Priority to ES0069852UpriorityCriticalpatent/ES69852U/en
Publication of ES69852UpublicationCriticalpatent/ES69852U/en
An auger for use in soft stone quarries and especially in plaster quarries, characterized in that it comprises a bar body provided integrally with a helical wing over the entire length, said bar ending in a widening provided with a recess where a drill bit is fitted. two arms of any known type. (Machine-translation by Google Translate, not legally binding)
ES0069852U1958-11-211958-11-21An auger for quarry use (Machine-translation by Google Translate, not legally binding)
PendingES69852U
(en)