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Priority claimed from FR7639554Aexternal-prioritypatent/FR2376287A1/en
Application filed by Elf AquitainefiledCriticalElf Aquitaine
Publication of MX5000EpublicationCriticalpatent/MX5000E/en
PROCEDURE FOR CREATING HOLES WITH PRE-DETERMINED, ANY CONTINUOUS OUTCONTURE, EXCLUSIVELY IN MOUNTAIN OR EARTH FORMATIONS, AND DRILL FOR USE IN EXERCISING THE PROCEDURE