Ключевые слова: 20s, 3, 50s, apprentice, apprenticeship, caucasian, engineering, factory, female, glasses, goggles, horizontal, industry, learning, machine, machinery, machinist, male, man, manufacturing, men, mill, milling, occupation, operating, operator, people, safety, side, teaching, technology, together, trail, training, twenties, view, women, worker, working, workshop,