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Self-centered device, to fixing twist drills, for sharpening - View of the device in a plane perpendicular to the axis of rotation of the drill

Dispozitiv autocentrant, de fixare a burghielor elicoidale, în vederea ascuţirii - Vedere a dispozitivului intr-un plan perpendicular pe axa de rotatie a burghiului

The device make the centering of twist drills in two reciprocal perpendicular directions. Part of the patent - Self-centered device, to fixing twist drills, for sharpening.