Ключевые слова: african, black, builder, career, clock, clocks, construction, day, deadline, employee, employment, engineer, facility, factory, hard work, hour, industrial, industry, job, labor, machinery, man, management, manufacturing, minute, minutes, occupation, people, perform, performance, process, production, productivity, professional, safety, schedule, seconds, skill, staff, technician, time, welfare, work, worker, working day, working hours, workman, workplace, young,