Ключевые слова: background, black, bolt, bridge, brown, cable, clamps, clip, closeup, connection, construction, design, detail, element, engineering, equipment, fastening, head, industrial, isolated, line, material, metal, modern, nut, old, padlock, pattern, roof, rope, rough, rust, rusty, saddle, screw, silver, sling, steel, strength, strong, structure, suspension, technology, texture, together, turnbuckle, twine, ubolt, wire,