Ключевые слова: building, business, civil, communication, concept, construction, contractor, dark, demolition, discussion, electrician, electronic, engineer, engineering, engineers, equipment, expert, facility, factory, general, happy, hardhat, helmet, improvement, industrial, industry, infrastructure, inspector, instructing, job, machine, machinery, maintenance, management, men, occupation, people, plan, professional, repair, safety, sustainability, system, team, teamwork, two, warehouse, work, worker, working,