Ключевые слова: abrasive, bit, blade, closeup, cut, edge, electrical, equipment, friction, grind, grinder, grinding, grindstone, iron, knife, know how, machine, machinery, metal, multi tool, multitool, power, preparing, rotary, service, shape, sharp, sharpen, sharpener, sharpening, stainless steel, steel, stone, tool, vintage, whetstone, worker,