Ключевые слова: adult, adults only, afroamerican, architect, bluecollar worker, building contractor, business, cheerful, closeup, colleague, construction industry, construction site, construction worker, cooperation, coworker, engineer, engineering, expertise, group of people, happiness, happy, hardhat, headwear, industry, laughing, lifestyles, males, man, men, mid adult, multiracial group, occupation, only men, people, place of work, planning, professional occupation, safety, senior adult, smiling, success, talking, teamwork, vitality, white people, work helmet, working,