Ключевые слова: 15 september, architect, banner, builder, building, business, cap, career, celebration, civil, construction, contractor, day, design, engineer, engineering, engineers, engineers day, equipment, expert, global, happy, helmet, illustration, indian, industrial, industry, international, labor, labour, male, man, national, poster, profession, professional, safety, september, teamwork, technician, template, tool, uniform, worker, workers, world,