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Priority claimed from FR8702757Aexternal-prioritypatent/FR2611918B1/en
Application filed by Inst Francais Du PetrolefiledCriticalInst Francais Du Petrole
Priority claimed from EP19880400433external-prioritypatent/EP0281469B1/en
Application grantedgrantedCritical
Publication of ATE66750T1publicationCriticalpatent/ATE66750T1/en
AT88400433T1987-02-271988-02-25
DEVICE THAT PARTICULARLY ALLOWS THE USE OF A SMALL RADIUS DRILLING DEVICE IN LARGE RADIUS DRILLING HOLES.
ATE66750T1
(en)