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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41/00
Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
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B23B41/12
for forming working surfaces of cylinders, of bearings, e.g. in heads of driving rods, or of other engine parts
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