Ключевые слова: alert, alertness, area, barrier, beach, boundary, building, building activity, building construction, building site, cautious, coast, coastline, construction barrier, construction industry, construction site, danger, defense, fence, grid, hazard, industrial, industry, outdoors, perforated, place of work, plastic, property, protect, protection, protection equipment, protective, safe, safe security equipment, safety, safety equipment, sea, seascape, security, site, warning, warning sign, workplace,