Ключевые слова: american, background, banner, builder, business, celebration, concept, construction, day, design, employment, engineer, equipment, factory, freedom, greeting, happy, helmet, holiday, illustration, industrial, international, job, labor, man, may, national, occupation, patriotism, people, portrait, poster, profession, professional, safety, silhouette, space, symbol, team, teamwork, technician, text, tool, us, victory, woman, work, workshop,