Ключевые слова: background, blade, circle, circular, closeup, cutter, danger, diamond, disk, electric, equipment, fire, grind, grinder, hands, industrial, industry, iron, knife, machine, machinery, man, manual, metal, metallic, motion, preparation, sharp, sharpen, sharpener, sharpening, spark, speed, steel, tool, whetstone, whirl, work, workshop,