Ключевые слова: 20s, 60s, apprentice, apprenticeship, caucasian, drill, drilling, engineer, engineering, equipment, factory, horizontal, indoors, industry, learning, machine, machinery, male, man, manual worker, manufacturing, men, milling machine, occupation, operating, overalls, people, person, precision, safety glasses, sixties, skilled, teaching, together, trainee, training, twenties, two people, working, workman, workshop,