Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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B23B
TURNING; BORING
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2251/00
Details of tools for drilling machines
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B23B2251/40
Flutes, i.e. chip conveying grooves
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B23B2251/404
with decreasing depth in a direction towards the shank from the tool tip
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