Ключевые слова: 20s, apprentices, assisting, automated, camera, caucasian, cold, colleague, computer, control, display, education, engineer, factory, faucet, fifties, has, machinery, male, notes, numerical, operator, panel, person, plumber, portrait, safety, skill, tap, teaching, three, tradesman, twenties, two, watching, woman, work, worker, working, writing,