File:Practical Treatise on Milling and Milling Machines p202.png

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English: Milling Flutes of Twist Drill
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Source https://en.wikisource.org/wiki/Page:Practical_Treatise_on_Milling_and_Milling_Machines.djvu/208
Author Brown & Sharpe Mfg. Co.

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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Practical_Treatise_on_Milling_and_Milling_Machines_p202.png

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