Ключевые слова: abstract, background, bearing, bolt, building, close, closeup, connection, construction, corroded, corrosion, detail, durable, engineering, expansion, failure, fortification, fortify, gears, girder, grey, heavy, industrial, industry, iron, large, load, metal, methods, nut, plate, powerful, rivet, row, rusty, screw, stability, steel, strong, structure, support, washer,