Ключевые слова: business, caucasian, coal, construction, design, digger, dust, energy, engineer, equipment, excavation, excavator, geology, gravel, hard, heavy, industrial, industry, job, looking, machinery, male, man, manager, material, mine, miner, mineral, mining, occupation, occupational safety, ore, people, person, pit, production, professional, project, quarry, safety, site, standing, team, technology, two, vest, winter, work, worker, working,