Ключевые слова: addition, angle, architectural, at, background, backgrounds, block, built, circle, close up, collapsible, colored, colors, column, concepts, construction, demountable, design, dimensional, diminishing, dismountable, edge, element, engineering, equipment, figure, five, flat, frame, generated, geometric, gray, group, growth, heap, hole, ideas, image, incomplete, industrial, industry, installing, iron, layered, making, material, metal, metallic, new, nol, number, objectsequipment, of, on, out, overlapping, pattern, progress, recognizable, repairing, row, sectional, set, silver, space, spacer, sparse, stability, stack, stainless, steel, structure, symbol, technology, three dimensional, tool, toughness, tower, various, vertical, view, washer, washers, white, work, zinc,