Ключевые слова: activity, adult, angle, background, bicycle, careful, circular, clamp, construction, cut, engineering, equipment, factory, flash, grinder, hand, horizontal, industrial, industry, iron, job, light, machine, male, man, manual, manufacturing, men, metal, motion, night, occupational, people, power, production, protection, protective, red, safety, sharpening, spark, steel, technology, tool, welder, welding, work, worker, workshop, year,