IMPLANTACIN DE UN PROGRAMA PARA LA DETECCIN PRECOZ DE HIPOACUSIA NEONATAL
2001
Method and device for grooving an hourglass screw wherein a tool shaft having an axis transverse to the screw blank has a tool movable selectively stepwise relative to the shaft when the tool is not engaged with the screw blank and locking means fix the tool when engaged with the screw blank for the grooving operation.
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