"Sharpening is the process of creating or refining 2 perpendicular axis into a converging "Apex" creating an edge of appropriate shape on a tool or implement designed for cutting. Sharpening is done by removing material on an implement with an abrasive substance harder than the material of the implement, followed sometimes by processes to polish/hone the sharp surface to increase smoothness." - (en.wikipedia.org 25.12.2021)
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