Ключевые слова: abrasive, background, block, blue, buffing, closeup, drum, equipment, grained, grind, grinder, grit, industrial, industry, leaning, machine, maintenance, manufacture, material, mechanical, mixed tumbled stones, natural, new, object, oxide, parts, polish, polisher, process, processing, production, pyramid, rigid, rock, rotary, sanding, sandpaper, shiny, smooth, stage, stone, stones background, triangle, tumble, tumbled stones background, variation, vibration, vibro, vibrohammer,