Ключевые слова: adult, architect, architecture, btp, builder, building, buildingsite, business, checking, communication, construction, constructionsite, controlling, design, electronics, engineer, engineering, foreman, industrial, industry, lifevest, machinary, man, manufacturing, metallic, occupation, outdoors, professional, safety jacket, security helmet, site manager, standing, structure, talking, using, walkietalkie, worker, working, yellow, young,