Ключевые слова: activity, african, analyzing, application, architect, black, building, business, checking, clock, clothing, construction, contractor, deadline, development, device, digital, electronic, employee, engineer, ethnicity, front, hardhat, helmet, hours, industry, instructor, leave, lifestyle, looking, maintenance, man, manager, multiracial, office, productive, professional, protection, protective, safety, scaffolding, smart, standing, time, using, vest, watch, window, worker, young,