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У13А steel razor sharpening on a Ural natural stone | by oldTor
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У13А steel razor sharpening on a Ural natural stone

Микрофото с Carl Zeiss Jena GF-Planachromat 12.5x/0.25 Microscope objective. 1,5мм. по горизонтали кадра.

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Taken on August 4, 2019