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Charles Ets
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Charles Ets
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Application filed by Charles EtsfiledCriticalCharles Ets
Application grantedgrantedCritical
Publication of FR858276ApublicationCriticalpatent/FR858276A/fr
B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23B—TURNING; BORING
B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
B23B41/02—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for boring deep holes; Trepanning, e.g. of gun or rifle barrels