Ключевые слова: 18, apprentice, apprenticeship, boron, caucasian, check, diameter, earmuffs, factory, friendly, industry, interaction, learning, machinist, male, manufacturing, men, metal, occupation, operator, people, relationship, skill, smiling, supervising, supervisor, teaching, teen, teenager, together, trail, training, two, verify, view, worker, working, workshop, years,