Ключевые слова: blade, circle, circular, construction, cut, cutting metal, disc, disk, drill, electric, electrical saw, engineering, equipment, factory, grind, grinder, grinding iron, hand, iron, manual, manufacturing, mechanic, metal, production, protection, rotate, round, saw, sawing metal, spark, sparks, speed, spin, steel, tool, treatment, welding, work, worker sawing, workshop,