Ключевые слова: background, bolt, building, carving, clamp, close, closeup, connected, connection, construction, corrosion, design, detail, dirty, drilling, element, engineering, equipment, fastened, foundation, hardware, heavy, industrial, industry, iron, iron mount, loop, macro, metal, metallic, mount, mounting, nut, nuts, object, old, plate, rough, round, rusty, rusty metal, screw, steel, street, structure, stud, surface, texture, thread, working,