Ключевые слова: background, black, blue, boom, cable, cargo, chain, city, construction, crane, development, electrical, energy, equipment, grease, hanging, hawser, heavy, hoist, hook, industrial, industry, iron, landmark, lift, lifting, machine, machinery, metal, old, petroleum, pipe, power, pulley, reel, rope, rust, safety, shaft, ship, site, sky, steel, strength, technology, tree, tube, winch, wire, work,