mineral-like substances whether man-made or not. files act by abrasion but are not classed as abrasives as they are a shaped bar of metal . however, diamond files are a form of coated abrasive (as they are metal rods coated with diamond powder). contents mechanics of abrasion abrasive minerals manufactured...
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the future notes references external links credits in unesco inscribed byblos as a cultural world heritage site , recognizing the historic value of the ruins of many successive civilizations found there. it has been closely linked to the legends and history of the mediterranean region for thousands of...