US PATENT SUBCLASS 408 / 705
DRILLING DEEP HOLES


Current as of: June, 1999
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408 /   HD   CUTTING BY USE OF ROTATING AXIALLY MOVING TOOL

705DRILLING DEEP HOLES


DEFINITION

Classification: 408/705

(under the class definition) A step or apparatus particularly adapted to cut openings into work, which openings have an exceptionally high ratio of depth to diameter.