Ключевые слова: arc, architecture, blurred, building, carpenter, cement, closeup, concrete, construction, craftsman, electricity, equipment, exterior, fire, flash, glittering, heat, hold, industrial, installation, interior, iron, job, level, man, mask, measurement, metal, occupation, perpendicular, pole, protection, ruler, safety, shield, site, skill, smoke, sparkling, steel, steelwork, structure, technician, tool, water, welder, welding, work, worker, workplace,