Ключевые слова: blue, building, business, concept, construction, craftsman, engineering, equipment, factory, fire, flash, gas, gloves, house, industrial, industry, iron, job, labor, laborer, light, line, male, man, mask, metal, occupation, people, pipe, protection, protective, red, repair, roof, safety, ship, shipyard, site, sky, spark, steel, structure, technology, vintage, welder, welding, work, worker, workplace,