Ключевые слова: background, builder, building, business, career, character, civil, computer, concept, construction, design, education, engineer, engineering, environment, equipment, expert, flat, friendly, full, gear, hard, hat, helmet, icon, industry, isolated, length, line, maintenance, male, man, people, person, profession, professional, research, sign, smiling, special, specialist, standing, symbol, technician, technology, tool, work, worker,