Ключевые слова: abstract, architecture, background, bar, beam, bridge, cast, construction, corrode, corrosion, crossbeam, design, die, engineering, frame, industrial, industry, iron, ladder, metal, mold, molded, nail, nebraska, net, niobrara, overpass, oxidation, pattern, peg, platte, rail, railing, rust, screw, shape, silhouette, spike, step, strong, structure, technology, tower, viaduct,