Ключевые слова: architecture, building, business, concrete, concrete floor, conference, construction, contractor, danger, development, employment, energy, engineer, engineering, equipment, estate, foreman, future, ground, hard, hardhat, headgear, healthy, helmet, industrial, industry, infrastructure, inspection, job, maintenance, material, measure, metal, people, plastic, professional, project, protect, reinforcement, safety, security, site, steel, success, survey, system, team, teamwork, work, worker,