Ключевые слова: adult, auto, automobile, automotive, bluecollar worker, brushed, concentration, construct, construction, construction industry, construction worker, craftsperson, create, cutting, diamond, dioxide, engine, engineering, entrepreneur, equipment, expertise, exploding, factory, grinder, horizontal, industry, iron metal, making, male, manufacturing, mechanic, men, metal, pipe, pipe tube, protection, repairing, safety, sawing, skill, spark, steel, structure, technology, tool, welding, work tool, working, workshop,