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FLAVIEN AURELIEN CHOFFEL
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FLAVIEN AURELIEN CHOFFEL
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Publication of FR398419ApublicationCriticalpatent/FR398419A/fr
E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
E21B15/00—Supports for the drilling machine, e.g. derricks or masts
E21B15/006—Means for anchoring the drilling machine to the ground
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Mining & Mineral Resources
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FR398419A1909-01-111909-01-11Procédé et appareil pour l'exploitation des mines et carrières de pierres ou matériaux tendres et mi-durs
ExpiredFR398419A
(fr)