Ключевые слова: background, chain, construction, crane, danger, device, electric, engineering, equipment, factory, hang, hanging, heavy, high, hoist, hook, industrial, industry, iron, lift, lifting, load, lowering, machine, machinery, material, metal, move, one, plant, power, pulley, red, rigging, rope, safety, single, site, sling, steel, system, technology, tool, weight, winch, work, yellow,