Ключевые слова: accident, alert, background, banner, beware, block, bulldozer, business, careful, caution, complete, concept, construction, copy, danger, dangerous, employee, engineer, engineering, environment, equipment, factory, fire, first, fulfill, harm, hazard, health, industrial, industry, injury, job, occupation, prevention, protection, risk, safe, safety, security, sign, site, space, success, warning, white, wood, word, work, worker, workplace,