Ключевые слова: abstract, backdrop, background, backgrounds, blue, brushed, closed, club, code, combination, compartment, contemporary, cover, decore, design, door, education, element, frame, gray, hard, horizontal, indoors, industrial, iron, label, lock, material, metal, metallic, modern, number, objects, polished, protection, safety, school, security, sign, silver, space, stainless, steel, surface, system, technology, template, texture,