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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3/00
General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines
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B23B3/22
Turning-machines or devices with rotary tool heads
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