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B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
B23G1/00—Thread cutting; Automatic machines specially designed therefor
B23G1/22—Machines specially designed for operating on pipes or tubes
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FR336575D1903-10-131903-10-19Perfectionnements dans les appareils pour maintenir, pour tourner, pour tarauder et pour couper les tubes
ExpiredFR336575A
(fr)