Ключевые слова: abrasive, ancient, blade, closeup, cut, cutter, danger, device, disk, electric, electrical, electricity, equipment, friction, grind, grinder, hand, handle, industrial, industry, iron, knife, machine, machinery, man, manual, metal, metallic, motion, occupation, power, rotary, service, sharp, sharpen, sharpener, sharpening, skill, speed, spin, steel, tool, traditional, vintage, wheel, work, worker, workshop,